Options for mariadbd & mysqld in 10.5 ES¶

The mariadbd utility is the newer name for mysqld, though you can still run it using either name.

Option

Description

--allow-suspicious-udfs

Allows use of UDFs consisting of only one symbol xxx() without corresponding xxx_init() or xxx_deinit(). That also means that one can load any function from any library, for example exit() from libc.so

--alter-algorithm

Specify the alter table algorithm. One of: DEFAULT, COPY, INPLACE, NOCOPY, INSTANT

--analyze-sample-percentage

Percentage of rows from the table ANALYZE TABLE will sample to collect table statistics. Set to 0 to let MariaDB decide what percentage of rows to sample.

--ansi (-a)

Use ANSI SQL syntax instead of MySQL syntax. This mode will also set transaction isolation level 'serializable'.

--aria-block-size

Block size to be used for Aria index pages.

--aria-checkpoint-interval

Interval between tries to do an automatic checkpoints. In seconds; 0 means 'no automatic checkpoints' which makes sense only for testing.

--aria-checkpoint-log-activity

Number of bytes that the transaction log has to grow between checkpoints before a new checkpoint is written to the log.

--aria-encrypt-tables

Encrypt tables (only for tables with ROW_FORMAT=PAGE (default) and not FIXED/DYNAMIC)

--aria-force-start-after-recovery-failures

Number of consecutive log recovery failures after which logs will be automatically deleted to cure the problem; 0 (the default) disables the feature.

--aria-group-commit

Specifies Aria group commit mode. Possible values are "none" (no group commit), "hard" (with waiting to actual commit), "soft" (no wait for commit (DANGEROUS!!!))

--aria-group-commit-interval

Interval between commits in microseconds (1/1000000 sec). 0 stands for no waiting for other threads to come and do a commit in "hard" mode and no sync()/commit at all in "soft" mode. Option has only an effect if aria_group_commit is used

--aria-log-dir-path

Path to the directory where to store transactional log

--aria-log-file-size

Limit for transaction log size

--aria-log-purge-type

Specifies how Aria transactional log will be purged. One of: immediate, external, at_flush

--aria-max-sort-file-size

Don't use the fast sort index method to created index if the temporary file would get bigger than this.

--aria-page-checksum

Maintain page checksums (can be overridden per table with PAGE_CHECKSUM clause in CREATE TABLE) (Defaults to on; use --skip-aria-page-checksum to disable.)

--aria-pagecache-age-threshold

This characterizes the number of hits a hot block has to be untouched until it is considered aged enough to be downgraded to a warm block. This specifies the percentage ratio of that number of hits to the total number of blocks in the page cache.

--aria-pagecache-buffer-size

The size of the buffer used for index blocks for Aria tables. Increase this to get better index handling (for all reads and multiple writes) to as much as you can afford.

--aria-pagecache-division-limit

The minimum percentage of warm blocks in key cache

--aria-pagecache-file-hash-size

Number of hash buckets for open and changed files. If you have a lot of Aria files open you should increase this for faster flush of changes. A good value is probably 1/10 of number of possible open Aria files.

--aria-recover-options

Specifies how corrupted tables should be automatically repaired. Any combination of: NORMAL, BACKUP, FORCE, QUICK, OFF

--aria-repair-threads

Number of threads to use when repairing Aria tables. The value of 1 disables parallel repair.

--aria-sort-buffer-size

The buffer that is allocated when sorting the index when doing a REPAIR or when creating indexes with CREATE INDEX or ALTER TABLE.

--aria-stats-method

Specifies how Aria index statistics collection code should treat NULLs. One of: nulls_unequal, nulls_equal, nulls_ignored

--aria-sync-log-dir

Controls syncing directory after log file growth and new file creation. One of: NEVER, NEWFILE, ALWAYS

--auto-increment-increment

Auto-increment columns are incremented by this

--auto-increment-offset

Offset added to Auto-increment columns. Used when auto-increment-increment != 1

--autocommit

Set default value for autocommit (0 or 1) (Defaults to on; use --skip-autocommit to disable.)

--automatic-sp-privileges

Creating and dropping stored procedures alters ACLs (Defaults to on; use --skip-automatic-sp-privileges to disable.)

--back-log

The number of outstanding connection requests MariaDB can have. This comes into play when the main MariaDB thread gets very many connection requests in a very short time (Automatically configured unless set explicitly)

--basedir (-b)

Path to installation directory. All paths are usually resolved relative to this

--big-tables

Old variable, which if set to 1, allows large result sets by saving all temporary sets to disk, avoiding 'table full' errors. No longer needed, as the server now handles this automatically.

--bind-address

IP address to bind to.

--binlog-annotate-row-events

Tells the master to annotate RBR events with the statement that caused these events (Defaults to on; use --skip-binlog-annotate-row-events to disable.)

--binlog-cache-size

The size of the transactional cache for updates to transactional engines for the binary log. If you often use transactions containing many statements, you can increase this to get more performance

--binlog-checksum

Type of BINLOG_CHECKSUM_ALG. Include checksum for log events in the binary log. One of: NONE, CRC32

--binlog-commit-wait-count

If non-zero, binlog write will wait at most binlog_commit_wait_usec microseconds for at least this many commits to queue up for group commit to the binlog. This can reduce I/O on the binlog and provide increased opportunity for parallel apply on the slave, but too high a value will decrease commit throughput.

--binlog-commit-wait-usec

Maximum time, in microseconds, to wait for more commits to queue up for binlog group commit. Only takes effect if the value of binlog_commit_wait_count is non-zero.

--binlog-direct-non-transactional-updates

Causes updates to non-transactional engines using statement format to be written directly to binary log. Before using this option make sure that there are no dependencies between transactional and non-transactional tables such as in the statement INSERT INTO t_myisam SELECT * FROM t_innodb; otherwise, slaves may diverge from the master.

--binlog-do-db

Tells the master it should log updates for the specified database, and exclude all others not explicitly mentioned.

--binlog-file-cache-size

The size of file cache for the binary log

--binlog-format

What form of binary logging the master will use: either ROW for row-based binary logging, STATEMENT for statement-based binary logging, or MIXED. MIXED is statement-based binary logging except for those statements where only row-based is correct: those which involve user-defined functions (i.e., UDFs) or the UUID() function; for those, row-based binary logging is automatically used.

--binlog-ignore-db

Tells the master that updates to the given database should not be logged to the binary log.

--binlog-optimize-thread-scheduling

Run fast part of group commit in a single thread, to optimize kernel thread scheduling. On by default. Disable to run each transaction in group commit in its own thread, which can be slower at very high concurrency. This option is mostly for testing one algorithm versus the other, and it should not normally be necessary to change it. (Defaults to on; use --skip-binlog-optimize-thread-scheduling to disable.)

--binlog-row-event-max-size

The maximum size of a row-based binary log event in bytes. Rows will be grouped into events smaller than this size if possible. The value has to be a multiple of 256.

--binlog-row-image

Controls whether rows should be logged in 'FULL', 'NOBLOB' or 'MINIMAL' formats. 'FULL', means that all columns in the before and after image are logged. 'NOBLOB', means that mysqld avoids logging blob columns whenever possible (e.g., blob column was not changed or is not part of primary key). 'MINIMAL', means that a PK equivalent (PK columns or full row if there is no PK in the table) is logged in the before image, and only changed columns are logged in the after image. (Default: FULL).

--binlog-row-metadata

Controls whether metadata is logged using FULL , MINIMAL format and NO_LOG.FULL causes all metadata to be logged; MINIMAL means that only metadata actually required by slave is logged; NO_LOG NO metadata will be logged.Default: NO_LOG.

--binlog-stmt-cache-size

The size of the statement cache for updates to non-transactional engines for the binary log. If you often use statements updating a great number of rows, you can increase this to get more performance.

--blackhole

Enable or disable BLACKHOLE plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--bootstrap

Used by mysql installation scripts.

--bulk-insert-buffer-size

Size of tree cache used in bulk insert optimisation. Note that this is a limit per thread!

--character-set-client-handshake

Don't ignore client side character set value sent during handshake. (Defaults to on; use --skip-character-set-client-handshake to disable.)

--character-set-filesystem

Set the filesystem character set.

--character-set-server (-C)

Set the default character set.

--character-sets-dir

Directory where character sets are

--chroot (-r)

Chroot mysqld daemon during startup.

--collation-server

Set the default collation.

--column-compression-threshold

Minimum column data length eligible for compression

--column-compression-zlib-level

zlib compression level (1 gives best speed, 9 gives best compression)

--column-compression-zlib-strategy

The strategy parameter is used to tune the compression algorithm. Use the value DEFAULT_STRATEGY for normal data, FILTERED for data produced by a filter (or predictor), HUFFMAN_ONLY to force Huffman encoding only (no string match), or RLE to limit match distances to one (run-length encoding). Filtered data consists mostly of small values with a somewhat random distribution. In this case, the compression algorithm is tuned to compress them better. The effect of FILTERED is to force more Huffman coding and less string matching; it is somewhat intermediate between DEFAULT_STRATEGY and HUFFMAN_ONLY. RLE is designed to be almost as fast as HUFFMAN_ONLY, but give better compression for PNG image data. The strategy parameter only affects the compression ratio but not the correctness of the compressed output even if it is not set appropriately. FIXED prevents the use of dynamic Huffman codes, allowing for a simpler decoder for special applications.

--column-compression-zlib-wrap

Generate zlib header and trailer and compute adler32 check value. It can be used with storage engines that don't provide data integrity verification to detect data corruption.

--columnstore

Enable or disable Columnstore plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--columnstore-columns

Enable or disable COLUMNSTORE_COLUMNS plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--columnstore-compression-type

Controls compression algorithm for create tables. Possible values are: NO_COMPRESSION segment files aren't compressed; SNAPPY segment files are Snappy compressed (default);

--columnstore-decimal-scale

The default decimal precision for calculated column sub-operations

--columnstore-derived-handler

Enable/Disable the MCS derived_handler (Defaults to on; use --skip-columnstore-derived-handler to disable.)

--columnstore-diskjoin-bucketsize

The maximum size in MB of each 'small side' table in memory.

--columnstore-diskjoin-largesidelimit

The maximum amount of disk space in MB to use per join for storing 'large side' table data for a disk-based join. (0 = unlimited)

--columnstore-diskjoin-smallsidelimit

The maximum amount of disk space in MB to use per query for storing 'small side' tables for a disk-based join. (0 = unlimited)

--columnstore-double-for-decimal-math

Enable/disable for ColumnStore to replace DECIMAL with DOUBLE in arithmetic operation.

--columnstore-extents

Enable or disable COLUMNSTORE_EXTENTS plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--columnstore-files

Enable or disable COLUMNSTORE_FILES plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--columnstore-group-by-handler

Enable/Disable the MCS group_by_handler (Defaults to on; use --skip-columnstore-group-by-handler to disable.)

--columnstore-import-for-batchinsert-delimiter

ASCII value of the delimiter used by LDI and INSERT..SELECT

--columnstore-import-for-batchinsert-enclosed-by

ASCII value of the quote symbol used by batch data ingestion

--columnstore-local-query

Enable/disable the ColumnStore local PM query only feature.

--columnstore-orderby-threads

Number of parallel threads used by ORDER BY. (default to 16)

--columnstore-ordered-only

Always use the first table in the from clause as the large side table for joins

--columnstore-replication-slave

Allow this MariaDB server to apply replication changes to ColumnStore

--columnstore-select-handler

Enable/Disable the MCS select_handler (Defaults to on; use --skip-columnstore-select-handler to disable.)

--columnstore-string-scan-threshold

Max number of blocks in a dictionary file to be scanned for filtering

--columnstore-stringtable-threshold

The minimum width of a string column to be stored in a string table

--columnstore-tables

Enable or disable COLUMNSTORE_TABLES plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--columnstore-um-mem-limit

Per user Memory limit(MB). Switch to disk-based JOIN when limit is reached

--columnstore-use-decimal-scale

Enable/disable the MCS decimal scale to be used internally

--columnstore-use-import-for-batchinsert

LOAD DATA INFILE and INSERT..SELECT will use cpimport internally. One of: OFF, ON, ALWAYS

--columnstore-varbin-always-hex

Always display/process varbinary columns as if they have been hexified.

--completion-type

The transaction completion type. One of: NO_CHAIN, CHAIN, RELEASE

--concurrent-insert

Use concurrent insert with MyISAM. One of: NEVER, AUTO, ALWAYS

--connect-timeout

The number of seconds the mysqld server is waiting for a connect packet before responding with 'Bad handshake'

--console

Write error output on screen; don't remove the console window on windows.

--core-file

Write core on errors.

--cracklib-password-check

Enable or disable cracklib_password_check plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--cracklib-password-check-dictionary

Path to a cracklib dictionary

--datadir (-h)

Path to the database root directory

--date-format

The DATE format (ignored)

--datetime-format

The DATETIME format (ignored)

--deadlock-search-depth-long

Long search depth for the two-step deadlock detection

--deadlock-search-depth-short

Short search depth for the two-step deadlock detection

--deadlock-timeout-long

Long timeout for the two-step deadlock detection (in microseconds)

--deadlock-timeout-short

Short timeout for the two-step deadlock detection (in microseconds)

--debug (-#)

Built in DBUG debugger. Disabled in this build.

--debug-abort-slave-event-count

Option used by mysql-test for debugging and testing of replication.

--debug-disconnect-slave-event-count

Option used by mysql-test for debugging and testing of replication.

--debug-exit-info (-T)

Used for debugging. Use at your own risk.

--debug-gdb

Set up signals usable for debugging.

--debug-max-binlog-dump-events

Option used by mysql-test for debugging and testing of replication.

--debug-no-sync

Disables system sync calls. Only for running tests or debugging!

--debug-no-thread-alarm

Disable system thread alarm calls. Disabling it may be useful in debugging or testing, never do it in production

--debug-sporadic-binlog-dump-fail

Option used by mysql-test for debugging and testing of replication.

--default-password-lifetime

This defines the global password expiration policy. 0 means automatic password expiration is disabled. If the value is a positive integer N, the passwords must be changed every N days. This behavior can be overridden using the password expiration options in ALTER USER.

--default-regex-flags

Default flags for the regex library. Any combination of: DOTALL, DUPNAMES, EXTENDED, EXTENDED_MORE, EXTRA, MULTILINE, UNGREEDY

--default-storage-engine

The default storage engine for new tables

--default-time-zone

Set the default time zone.

--default-tmp-storage-engine

The default storage engine for user-created temporary tables

--default-week-format

The default week format used by WEEK() functions

--defaults-extra-file

Read this file after the global files are read.

--defaults-file

Only read default options from the given file #.

--defaults-group-suffix

Additionally read default groups with # appended as a suffix.

--delay-key-write

Specifies how MyISAM tables handles CREATE TABLE DELAY_KEY_WRITE. If set to ON, the default, any DELAY KEY WRITEs are honored. The key buffer is then flushed only when the table closes, speeding up writes. MyISAM tables should be automatically checked upon startup in this case, and --external locking should not be used, as it can lead to index corruption. If set to OFF, DELAY KEY WRITEs are ignored, while if set to ALL, all new opened tables are treated as if created with DELAY KEY WRITEs enabled.

--delayed-insert-limit

After inserting delayed_insert_limit rows, the INSERT DELAYED handler will check if there are any SELECT statements pending. If so, it allows these to execute before continuing.

--delayed-insert-timeout

How long a INSERT DELAYED thread should wait for INSERT statements before terminating

--delayed-queue-size

What size queue (in rows) should be allocated for handling INSERT DELAYED. If the queue becomes full, any client that does INSERT DELAYED will wait until there is room in the queue again

--des-key-file

Load keys for des_encrypt() and des_encrypt from given file.

--disconnect-on-expired-password

This variable controls how the server handles clients that are not aware of the sandbox mode. If enabled, the server disconnects the client, otherwise the server puts the client in a sandbox mode.

--disks

Enable or disable DISKS plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--div-precision-increment

Precision of the result of '/' operator will be increased on that value

--ed25519

Enable or disable ed25519 plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--encrypt-binlog

Encrypt binary logs (including relay logs)

--encrypt-tmp-disk-tables

Encrypt temporary on-disk tables (created as part of query execution)

--encrypt-tmp-files

Encrypt temporary files (created for filesort, binary log cache, etc)

--enforce-storage-engine

Force the use of a storage engine for new tables

--eq-range-index-dive-limit

The optimizer will use existing index statistics instead of doing index dives for equality ranges if the number of equality ranges for the index is larger than or equal to this number. If set to 0, index dives are always used.

--event-scheduler

Enable the event scheduler. Possible values are ON, OFF, and DISABLED (keep the event scheduler completely deactivated, it cannot be activated run-time)

--expensive-subquery-limit

The maximum number of rows a subquery may examine in order to be executed during optimization and used for constant optimization

--expire-logs-days

If non-zero, binary logs will be purged after expire_logs_days days; possible purges happen at startup and at binary log rotation

--explicit-defaults-for-timestamp

This option causes CREATE TABLE to create all TIMESTAMP columns as NULL with DEFAULT NULL attribute, Without this option, TIMESTAMP columns are NOT NULL and have implicit DEFAULT clauses.

--external-locking

Use system (external) locking (disabled by default). With this option enabled you can run myisamchk to test (not repair) tables while the MySQL server is running. Disable with --skip-external-locking.

--extra-max-connections

The number of connections on extra-port

--extra-port

Extra port number to use for tcp connections in a one-thread-per-connection manner. 0 means don't use another port

--feedback

Enable or disable FEEDBACK plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--feedback-http-proxy

Proxy server host:port.

--feedback-send-retry-wait

Wait this many seconds before retrying a failed send.

--feedback-send-timeout

Timeout (in seconds) for the sending the report.

--feedback-url

Space separated URLs to send the feedback report to.

--feedback-user-info

User specified string that will be included in the feedback report.

--file-key-management

Enable or disable file_key_management plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--file-key-management-encryption-algorithm

Encryption algorithm to use, aes_ctr is the recommended one.. One of: aes_cbc, aes_ctr

--file-key-management-filekey

Key to encrypt / decrypt the keyfile.

--file-key-management-filename

Path and name of the key file.

--flashback

Setup the server to use flashback. This enables binary log in row mode and will enable extra logging for DDL's needed by flashback feature

--flush

Flush MyISAM tables to disk between SQL commands

--flush-time

A dedicated thread is created to flush all tables at the given interval

--ft-boolean-syntax

List of operators for MATCH ... AGAINST ( ... IN BOOLEAN MODE)

--ft-max-word-len

The maximum length of the word to be included in a FULLTEXT index. Note: FULLTEXT indexes must be rebuilt after changing this variable

--ft-min-word-len

The minimum length of the word to be included in a FULLTEXT index. Note: FULLTEXT indexes must be rebuilt after changing this variable

--ft-query-expansion-limit

Number of best matches to use for query expansion

--ft-stopword-file

Use stopwords from this file instead of built-in list

--gdb

Set up signals usable for debugging. Deprecated, use --debug-gdb instead.

--general-log

Log connections and queries to a table or log file. Defaults logging to a file 'hostname'.log or a table mysql.general_logif --log-output=TABLE is used.

--general-log-file

Log connections and queries to given file

--getopt-prefix-matching

Recognize command-line options by their unambiguos prefixes. (Defaults to on; use --skip-getopt-prefix-matching to disable.)

--group-concat-max-len

The maximum length of the result of function GROUP_CONCAT()

--gssapi

Enable or disable gssapi plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--gssapi-keytab-path

Keytab file path for Kerberos authentication

--gssapi-principal-name

GSSAPI target name - service principal name for Kerberos authentication.

--gtid-cleanup-batch-size

Normally does not need tuning. How many old rows must accumulate in the mysql.gtid_slave_pos table before a background job will be run to delete them. Can be increased to reduce number of commits if using many different engines with --gtid_pos_auto_engines, or to reduce CPU overhead if using a huge number of different gtid_domain_ids. Can be decreased to reduce number of old rows in the table.

--gtid-domain-id

Used with global transaction ID to identify logically independent replication streams. When events can propagate through multiple parallel paths (for example multiple masters), each independent source server must use a distinct domain_id. For simple tree-shaped replication topologies, it can be left at its default, 0.

--gtid-ignore-duplicates

When set, different master connections in multi-source replication are allowed to receive and process event groups with the same GTID (when using GTID mode). Only one will be applied, any others will be ignored. Within a given replication domain, just the sequence number will be used to decide whether a given GTID has been already applied; this means it is the responsibility of the user to ensure that GTID sequence numbers are strictly increasing.

--gtid-pos-auto-engines

List of engines for which to automatically create a mysql.gtid_slave_pos_ENGINE table, if a transaction using that engine is replicated. This can be used to avoid introducing cross-engine transactions, if engines are used different from that used by table mysql.gtid_slave_pos

--gtid-strict-mode

Enforce strict seq_no ordering of events in the binary log. Slave stops with an error if it encounters an event that would cause it to generate an out-of-order binlog if executed.

--hashicorp-key-management

Enable or disable hashicorp_key_management plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--hashicorp-key-management-caching-enabled

Enable key caching (storing key values received from the Hashicorp Vault server in the local memory) (Defaults to on; use --skip-hashicorp-key-management-caching-enabled to disable.)

--hashicorp-key-management-max-retries

Number of server request retries in case of timeout

--hashicorp-key-management-timeout

Duration (in seconds) for the Hashicorp Vault server connection timeout

--hashicorp-key-management-token

Authentication token that passed to the Hashicorp Vault in the request header

--hashicorp-key-management-use-cache-on-timeout

In case of timeout (when accessing the vault server) use the value taken from the cache

--hashicorp-key-management-vault-ca

Path to the Certificate Authority (CA) bundle (is a file that contains root and intermediate certificates)

--hashicorp-key-management-vault-url

HTTP[s] URL that is used to connect to the Hashicorp Vault server

--help (-?)

Display this help and exit.

--histogram-size

Number of bytes used for a histogram. If set to 0, no histograms are created by ANALYZE.

--histogram-type

Specifies type of the histograms created by ANALYZE. Possible values are: SINGLE_PREC_HB - single precision height-balanced, DOUBLE_PREC_HB - double precision height-balanced.

--host-cache-size

How many host names should be cached to avoid resolving. (Automatically configured unless set explicitly)

--idle-readonly-transaction-timeout

The number of seconds the server waits for read-only idle transaction

--idle-transaction-timeout

The number of seconds the server waits for idle transaction

--idle-write-transaction-timeout

The number of seconds the server waits for write idle transaction

--ignore-builtin-innodb

Disable initialization of builtin InnoDB plugin

--ignore-db-dirs

Specifies a directory to add to the ignore list when collecting database names from the datadir. Put a blank argument to reset the list accumulated so far.

--in-predicate-conversion-threshold

The minimum number of scalar elements in the value list of IN predicate that triggers its conversion to IN subquery. Set to 0 to disable the conversion.

--init-connect

Command(s) that are executed for each new connection (unless the user has SUPER privilege)

--init-file

Read SQL commands from this file at startup

--init-rpl-role

Set the replication role. One of: MASTER, SLAVE

--init-slave

Command(s) that are executed by a slave server each time the SQL thread starts

--innodb

Enable or disable InnoDB plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--innodb-adaptive-flushing

Attempt flushing dirty pages to avoid IO bursts at checkpoints. (Defaults to on; use --skip-innodb-adaptive-flushing to disable.)

--innodb-adaptive-flushing-lwm

Percentage of log capacity below which no adaptive flushing happens.

--innodb-adaptive-hash-index

Enable InnoDB adaptive hash index (disabled by default).

--innodb-adaptive-hash-index-parts

Number of InnoDB Adaptive Hash Index Partitions (default 8)

--innodb-adaptive-max-sleep-delay

Deprecated parameter with no effect.

--innodb-autoextend-increment

Data file autoextend increment in megabytes

--innodb-autoinc-lock-mode

The AUTOINC lock modes supported by InnoDB: 0 => Old style AUTOINC locking (for backward compatibility); 1 => New style AUTOINC locking; 2 => No AUTOINC locking (unsafe for SBR)

--innodb-background-scrub-data-check-interval

Deprecated parameter with no effect.

--innodb-background-scrub-data-compressed

Deprecated parameter with no effect.

--innodb-background-scrub-data-interval

Deprecated parameter with no effect.

--innodb-background-scrub-data-uncompressed

Deprecated parameter with no effect.

--innodb-buf-dump-status-frequency

A number between [0, 100] that tells how oftern buffer pool dump status in percentages should be printed. E.g. 10 means that buffer pool dump status is printed when every 10% of number of buffer pool pages are dumped. Default is 0 (only start and end status is printed).

--innodb-buffer-page

Enable or disable INNODB_BUFFER_PAGE plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--innodb-buffer-page-lru

Enable or disable INNODB_BUFFER_PAGE_LRU plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--innodb-buffer-pool-chunk-size

Size of a single memory chunk for resizing buffer pool. Online buffer pool resizing happens at this granularity. 0 means disable resizing buffer pool.

--innodb-buffer-pool-dump-at-shutdown

Dump the buffer pool into a file named @@innodb_buffer_pool_filename (Defaults to on; use --skip-innodb-buffer-pool-dump-at-shutdown to disable.)

--innodb-buffer-pool-dump-now

Trigger an immediate dump of the buffer pool into a file named @@innodb_buffer_pool_filename

--innodb-buffer-pool-dump-pct

Dump only the hottest N% of each buffer pool, defaults to 25

--innodb-buffer-pool-filename

Filename to/from which to dump/load the InnoDB buffer pool

--innodb-buffer-pool-instances

Deprecated parameter with no effect.

--innodb-buffer-pool-load-abort

Abort a currently running load of the buffer pool

--innodb-buffer-pool-load-at-startup

Load the buffer pool from a file named @@innodb_buffer_pool_filename (Defaults to on; use --skip-innodb-buffer-pool-load-at-startup to disable.)

--innodb-buffer-pool-load-now

Trigger an immediate load of the buffer pool from a file named @@innodb_buffer_pool_filename

--innodb-buffer-pool-size

The size of the memory buffer InnoDB uses to cache data and indexes of its tables.

--innodb-buffer-pool-stats

Enable or disable INNODB_BUFFER_POOL_STATS plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--innodb-change-buffer-max-size

Maximum on-disk size of change buffer in terms of percentage of the buffer pool.

--innodb-change-buffering

Buffer changes to secondary indexes.. One of: none, inserts, deletes, changes, purges, all

--innodb-checksum-algorithm

The algorithm InnoDB uses for page checksumming. Possible values are FULL_CRC32 for new files, always use CRC-32C; for old, see CRC32 below; STRICT_FULL_CRC32 for new files, always use CRC-32C; for old, see STRICT_CRC32 below; CRC32 write crc32, allow any of the other checksums to match when reading; STRICT_CRC32 write crc32, do not allow other algorithms to match when reading; INNODB write a software calculated checksum, allow any other checksums to match when reading; STRICT_INNODB write a software calculated checksum, do not allow other algorithms to match when reading; NONE write a constant magic number, do not do any checksum verification when reading (same as innodb_checksums=OFF); STRICT_NONE write a constant magic number, do not allow values other than that magic number when reading; Files updated when this option is set to crc32 or strict_crc32 will not be readable by MariaDB versions older than 10.0.4; new files created with full_crc32 are readable by MariaDB 10.4.3+

--innodb-cmp

Enable or disable INNODB_CMP plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--innodb-cmp-per-index

Enable or disable INNODB_CMP_PER_INDEX plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--innodb-cmp-per-index-enabled

Enable INFORMATION_SCHEMA.innodb_cmp_per_index, may have negative impact on performance (off by default)

--innodb-cmp-per-index-reset

Enable or disable INNODB_CMP_PER_INDEX_RESET plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--innodb-cmp-reset

Enable or disable INNODB_CMP_RESET plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--innodb-cmpmem

Enable or disable INNODB_CMPMEM plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--innodb-cmpmem-reset

Enable or disable INNODB_CMPMEM_RESET plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--innodb-commit-concurrency

Deprecated parameter with no effect.

--innodb-compression-algorithm

Compression algorithm used on page compression. One of: none, zlib, lz4, lzo, lzma, or bzip2

--innodb-compression-default

Is compression the default for new tables

--innodb-compression-failure-threshold-pct

If the compression failure rate of a table is greater than this number more padding is added to the pages to reduce the failures. A value of zero implies no padding

--innodb-compression-level

Compression level used for zlib compression. 0 is no compression, 1 is fastest, 9 is best compression and default is 6.

--innodb-compression-pad-pct-max

Percentage of empty space on a data page that can be reserved to make the page compressible.

--innodb-concurrency-tickets

Deprecated parameter with no effect.

--innodb-data-file-path

Path to individual files and their sizes.

--innodb-data-home-dir

The common part for InnoDB table spaces.

--innodb-deadlock-detect

Enable/disable InnoDB deadlock detector (default ON). if set to OFF, deadlock detection is skipped, and we rely on innodb_lock_wait_timeout in case of deadlock. (Defaults to on; use --skip-innodb-deadlock-detect to disable.)

--innodb-default-encryption-key-id

Default encryption key id used for table encryption.

--innodb-default-row-format

The default ROW FORMAT for all innodb tables created without explicit ROW_FORMAT. Possible values are REDUNDANT, COMPACT, and DYNAMIC. The ROW_FORMAT value COMPRESSED is not allowed. One of: redundant, compact, dynamic

--innodb-defragment

Enable/disable InnoDB defragmentation (default FALSE). When set to FALSE, all existing defragmentation will be paused. And new defragmentation command will fail.Paused defragmentation commands will resume when this variable is set to true again.

--innodb-defragment-fill-factor

A number between [0.7, 1] that tells defragmentation how full it should fill a page. Default is 0.9. Number below 0.7 won't make much sense.This variable, together with innodb_defragment_fill_factor_n_recs, is introduced so defragmentation won't pack the page too full and cause page split on the next insert on every page. The variable indicating more defragmentation gain is the one effective.

--innodb-defragment-fill-factor-n-recs

How many records of space defragmentation should leave on the page. This variable, together with innodb_defragment_fill_factor, is introduced so defragmentation won't pack the page too full and cause page split on the next insert on every page. The variable indicating more defragmentation gain is the one effective.

--innodb-defragment-frequency

Do not defragment a single index more than this number of time per second.This controls the number of time defragmentation thread can request X_LOCK on an index. Defragmentation thread will check whether 1/defragment_frequency (s) has passed since it worked on this index last time, and put the index back to the queue if not enough time has passed. The actual frequency can only be lower than this given number.

--innodb-defragment-n-pages

Number of pages considered at once when merging multiple pages to defragment

--innodb-defragment-stats-accuracy

How many defragment stats changes there are before the stats are written to persistent storage. Set to 0 meaning disable defragment stats tracking.

--innodb-disable-sort-file-cache

Whether to disable OS system file cache for sort I/O

--innodb-doublewrite

Enable InnoDB doublewrite buffer (enabled by default). Disable with --skip-innodb-doublewrite. (Defaults to on; use --skip-innodb-doublewrite to disable.)

--innodb-encrypt-log

Enable redo log encryption

--innodb-encrypt-tables

Enable encryption for tables. Don't forget to enable --innodb-encrypt-log too. One of: OFF, ON, FORCE

--innodb-encrypt-temporary-tables

Enrypt the temporary table data.

--innodb-encryption-rotate-key-age

Key rotation - re-encrypt in background all pages that were encrypted with a key that many (or more) versions behind. Value 0 indicates that key rotation is disabled.

--innodb-encryption-rotation-iops

Use this many iops for background key rotation

--innodb-encryption-threads

Number of threads performing background key rotation

--innodb-fast-shutdown

Speeds up the shutdown process of the InnoDB storage engine. Possible values are 0, 1 (faster), 2 (crash-like), 3 (fastest clean).

--innodb-fatal-semaphore-wait-threshold

Maximum number of seconds that semaphore times out in InnoDB.

--innodb-file-format

Deprecated parameter with no effect.

--innodb-file-per-table

Stores each InnoDB table to an .ibd file in the database dir. (Defaults to on; use --skip-innodb-file-per-table to disable.)

--innodb-fill-factor

Percentage of B-tree page filled during bulk insert

--innodb-flush-log-at-timeout

Write and flush logs every (n) second.

--innodb-flush-log-at-trx-commit

Controls the durability/speed trade-off for commits. Set to 0 (write and flush redo log to disk only once per second), 1 (flush to disk at each commit), 2 (write to log at commit but flush to disk only once per second) or 3 (flush to disk at prepare and at commit, slower and usually redundant). 1 and 3 guarantees that after a crash, committed transactions will not be lost and will be consistent with the binlog and other transactional engines. 2 can get inconsistent and lose transactions if there is a power failure or kernel crash but not if mysqld crashes. 0 has no guarantees in case of crash. 0 and 2 can be faster than 1 or 3.

--innodb-flush-method

With which method to flush data.. One of: fsync, O_DSYNC, littlesync, nosync, O_DIRECT, O_DIRECT_NO_FSYNC

--innodb-flush-neighbors

Set to 0 (don't flush neighbors from buffer pool), 1 (flush contiguous neighbors from buffer pool) or 2 (flush neighbors from buffer pool), when flushing a block

--innodb-flush-sync

Allow IO bursts at the checkpoints ignoring io_capacity setting. (Defaults to on; use --skip-innodb-flush-sync to disable.)

--innodb-flushing-avg-loops

Number of iterations over which the background flushing is averaged.

--innodb-force-load-corrupted

Force InnoDB to load metadata of corrupted table.

--innodb-force-primary-key

Do not allow to create table without primary key (off by default)

--innodb-force-recovery

Helps to save your data in case the disk image of the database becomes corrupt. Value 5 can return bogus data, and 6 can permanently corrupt data.

--innodb-ft-aux-table

FTS internal auxiliary table to be checked

--innodb-ft-being-deleted

Enable or disable INNODB_FT_BEING_DELETED plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--innodb-ft-cache-size

InnoDB Fulltext search cache size in bytes

--innodb-ft-config

Enable or disable INNODB_FT_CONFIG plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--innodb-ft-default-stopword

Enable or disable INNODB_FT_DEFAULT_STOPWORD plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--innodb-ft-deleted

Enable or disable INNODB_FT_DELETED plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--innodb-ft-enable-diag-print

Whether to enable additional FTS diagnostic printout

--innodb-ft-enable-stopword

Create FTS index with stopword. (Defaults to on; use --skip-innodb-ft-enable-stopword to disable.)

--innodb-ft-index-cache

Enable or disable INNODB_FT_INDEX_CACHE plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--innodb-ft-index-table

Enable or disable INNODB_FT_INDEX_TABLE plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--innodb-ft-max-token-size

InnoDB Fulltext search maximum token size in characters

--innodb-ft-min-token-size

InnoDB Fulltext search minimum token size in characters

--innodb-ft-num-word-optimize

InnoDB Fulltext search number of words to optimize for each optimize table call

--innodb-ft-result-cache-limit

InnoDB Fulltext search query result cache limit in bytes

--innodb-ft-server-stopword-table

The user supplied stopword table name.

--innodb-ft-sort-pll-degree

InnoDB Fulltext search parallel sort degree, will round up to nearest power of 2 number

--innodb-ft-total-cache-size

Total memory allocated for InnoDB Fulltext Search cache

--innodb-ft-user-stopword-table

User supplied stopword table name, effective in the session level.

--innodb-idle-flush-pct

Up to what percentage of dirty pages should be flushed when innodb finds it has spare resources to do so.

--innodb-immediate-scrub-data-uncompressed

Enable scrubbing of data

--innodb-instant-alter-column-allowed

File format constraint for ALTER TABLE. One of: never, add_last, add_drop_reorder

--innodb-io-capacity

Number of IOPs the server can do. Tunes the background IO rate

--innodb-io-capacity-max

Limit to which innodb_io_capacity can be inflated.

--innodb-large-prefix

Deprecated parameter with no effect.

--innodb-lock-schedule-algorithm

The algorithm Innodb uses for deciding which locks to grant next when a lock is released. Possible values are FCFS grant the locks in First-Come-First-Served order; VATS use the Variance-Aware-Transaction-Scheduling algorithm, which uses an Eldest-Transaction-First heuristic.. One of: fcfs, vats

--innodb-lock-wait-timeout

Timeout in seconds an InnoDB transaction may wait for a lock before being rolled back. Values above 100000000 disable the timeout.

--innodb-lock-waits

Enable or disable INNODB_LOCK_WAITS plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--innodb-locks

Enable or disable INNODB_LOCKS plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--innodb-log-buffer-size

The size of the buffer which InnoDB uses to write log to the log files on disk.

--innodb-log-checksums

Deprecated parameter with no effect. (Defaults to on; use --skip-innodb-log-checksums to disable.)

--innodb-log-compressed-pages

Deprecated parameter with no effect. (Defaults to on; use --skip-innodb-log-compressed-pages to disable.)

--innodb-log-file-size

Size of each log file in a log group.

--innodb-log-files-in-group

Deprecated parameter with no effect.

--innodb-log-group-home-dir

Path to InnoDB log files.

--innodb-log-optimize-ddl

Deprecated parameter with no effect.

--innodb-log-write-ahead-size

Redo log write ahead unit size to avoid read-on-write, it should match the OS cache block IO size

--innodb-lru-scan-depth

How deep to scan LRU to keep it clean

--innodb-max-dirty-pages-pct

Percentage of dirty pages allowed in bufferpool.

--innodb-max-dirty-pages-pct-lwm

Percentage of dirty pages at which flushing kicks in.

--innodb-max-purge-lag

Desired maximum length of the purge queue (0 = no limit)

--innodb-max-purge-lag-delay

Maximum delay of user threads in micro-seconds

--innodb-max-undo-log-size

Desired maximum UNDO tablespace size in bytes

--innodb-metrics

Enable or disable INNODB_METRICS plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--innodb-monitor-disable

Turn off a monitor counter

--innodb-monitor-enable

Turn on a monitor counter

--innodb-monitor-reset

Reset a monitor counter

--innodb-monitor-reset-all

Reset all values for a monitor counter

--innodb-mutexes

Enable or disable INNODB_MUTEXES plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--innodb-old-blocks-pct

Percentage of the buffer pool to reserve for 'old' blocks.

--innodb-old-blocks-time

Move blocks to the 'new' end of the buffer pool if the first access was at least this many milliseconds ago. The timeout is disabled if 0.

--innodb-online-alter-log-max-size

Maximum modification log file size for online index creation

--innodb-open-files

How many files at the maximum InnoDB keeps open at the same time.

--innodb-optimize-fulltext-only

Only optimize the Fulltext index of the table

--innodb-page-cleaners

Deprecated parameter with no effect.

--innodb-page-size

Page size to use for all InnoDB tablespaces.

--innodb-prefix-index-cluster-optimization

Enable prefix optimization to sometimes avoid cluster index lookups.

--innodb-print-all-deadlocks

Print all deadlocks to MariaDB error log (off by default)

--innodb-purge-batch-size

Number of UNDO log pages to purge in one batch from the history list.

--innodb-purge-rseg-truncate-frequency

Dictates rate at which UNDO records are purged. Value N means purge rollback segment(s) on every Nth iteration of purge invocation

--innodb-purge-threads

Number of tasks for purging transaction history

--innodb-random-read-ahead

Whether to use read ahead for random access within an extent.

--innodb-read-ahead-threshold

Number of pages that must be accessed sequentially for InnoDB to trigger a readahead.

--innodb-read-io-threads

Number of background read I/O threads in InnoDB.

--innodb-read-only

Start InnoDB in read only mode (off by default)

--innodb-replication-delay

Deprecated parameter with no effect.

--innodb-rollback-on-timeout

Roll back the complete transaction on lock wait timeout, for 4.x compatibility (disabled by default)

--innodb-scrub-log

Deprecated parameter with no effect.

--innodb-scrub-log-speed

Deprecated parameter with no effect.

--innodb-sort-buffer-size

Memory buffer size for index creation

--innodb-spin-wait-delay

Maximum delay between polling for a spin lock (4 by default)

--innodb-stats-auto-recalc

InnoDB automatic recalculation of persistent statistics enabled for all tables unless overridden at table level (automatic recalculation is only done when InnoDB decides that the table has changed too much and needs a new statistics) (Defaults to on; use --skip-innodb-stats-auto-recalc to disable.)

--innodb-stats-include-delete-marked

Include delete marked records when calculating persistent statistics

--innodb-stats-method

Specifies how InnoDB index statistics collection code should treat NULLs. Possible values are NULLS_EQUAL (default), NULLS_UNEQUAL and NULLS_IGNORED. One of: nulls_equal, nulls_unequal, nulls_ignored

--innodb-stats-modified-counter

The number of rows modified before we calculate new statistics (default 0 = current limits)

--innodb-stats-on-metadata

Enable statistics gathering for metadata commands such as SHOW TABLE STATUS for tables that use transient statistics (off by default)

--innodb-stats-persistent

InnoDB persistent statistics enabled for all tables unless overridden at table level (Defaults to on; use --skip-innodb-stats-persistent to disable.)

--innodb-stats-persistent-sample-pages

The number of leaf index pages to sample when calculating persistent statistics (by ANALYZE, default 20)

--innodb-stats-traditional

Enable traditional statistic calculation based on number of configured pages (default true) (Defaults to on; use --skip-innodb-stats-traditional to disable.)

--innodb-stats-transient-sample-pages

The number of leaf index pages to sample when calculating transient statistics (if persistent statistics are not used, default 8)

--innodb-status-file

Enable SHOW ENGINE INNODB STATUS output in the innodb_status.<pid> file

--innodb-status-output

Enable InnoDB monitor output to the error log.

--innodb-status-output-locks

Enable InnoDB lock monitor output to the error log. Requires innodb_status_output=ON.

--innodb-strict-mode

Use strict mode when evaluating create options. (Defaults to on; use --skip-innodb-strict-mode to disable.)

--innodb-sync-array-size

Size of the mutex/lock wait array.

--innodb-sync-spin-loops

Count of spin-loop rounds in InnoDB mutexes (30 by default)

--innodb-sys-columns

Enable or disable INNODB_SYS_COLUMNS plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--innodb-sys-datafiles

Enable or disable INNODB_SYS_DATAFILES plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--innodb-sys-fields

Enable or disable INNODB_SYS_FIELDS plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--innodb-sys-foreign

Enable or disable INNODB_SYS_FOREIGN plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--innodb-sys-foreign-cols

Enable or disable INNODB_SYS_FOREIGN_COLS plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--innodb-sys-indexes

Enable or disable INNODB_SYS_INDEXES plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--innodb-sys-semaphore-waits

Enable or disable INNODB_SYS_SEMAPHORE_WAITS plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--innodb-sys-tables

Enable or disable INNODB_SYS_TABLES plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--innodb-sys-tablespaces

Enable or disable INNODB_SYS_TABLESPACES plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--innodb-sys-tablestats

Enable or disable INNODB_SYS_TABLESTATS plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--innodb-sys-virtual

Enable or disable INNODB_SYS_VIRTUAL plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--innodb-table-locks

Enable InnoDB locking in LOCK TABLES (Defaults to on; use --skip-innodb-table-locks to disable.)

--innodb-tablespaces-encryption

Enable or disable INNODB_TABLESPACES_ENCRYPTION plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--innodb-temp-data-file-path

Path to files and their sizes making temp-tablespace.

--innodb-thread-concurrency

Deprecated parameter with no effect.

--innodb-thread-sleep-delay

Deprecated parameter with no effect.

--innodb-tmpdir

Directory for temporary non-tablespace files.

--innodb-trx

Enable or disable INNODB_TRX plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--innodb-undo-directory

Directory where undo tablespace files live, this path can be absolute.

--innodb-undo-log-truncate

Enable or Disable Truncate of UNDO tablespace.

--innodb-undo-logs

Deprecated parameter with no effect.

--innodb-undo-tablespaces

Number of undo tablespaces to use.

--innodb-use-atomic-writes

Enable atomic writes, instead of using the doublewrite buffer, for files on devices that supports atomic writes. To use this option one must use innodb_file_per_table=1, innodb_flush_method=O_DIRECT. This option only works on Linux with either FusionIO cards using the directFS filesystem or with Shannon cards using any file system. (Defaults to on; use --skip-innodb-use-atomic-writes to disable.)

--innodb-use-native-aio

Use native AIO if supported on this platform. (Defaults to on; use --skip-innodb-use-native-aio to disable.)

--innodb-write-io-threads

Number of background write I/O threads in InnoDB.

--interactive-timeout

The number of seconds the server waits for activity on an interactive connection before closing it

--join-buffer-size

The size of the buffer that is used for joins

--join-buffer-space-limit

The limit of the space for all join buffers used by a query

--join-cache-level

Controls what join operations can be executed with join buffers. Odd numbers are used for plain join buffers while even numbers are used for linked buffers

--keep-files-on-create

Don't overwrite stale .MYD and .MYI even if no directory is specified

--key-buffer-size

The size of the buffer used for index blocks for MyISAM tables. Increase this to get better index handling (for all reads and multiple writes) to as much as you can afford

--key-cache-age-threshold

This characterizes the number of hits a hot block has to be untouched until it is considered aged enough to be downgraded to a warm block. This specifies the percentage ratio of that number of hits to the total number of blocks in key cache

--key-cache-block-size

The default size of key cache blocks

--key-cache-division-limit

The minimum percentage of warm blocks in key cache

--key-cache-file-hash-size

Number of hash buckets for open and changed files. If you have a lot of MyISAM files open you should increase this for faster flush of changes. A good value is probably 1/10 of number of possible open MyISAM files.

--key-cache-segments

The number of segments in a key cache

--language (-L)

Client error messages in given language. May be given as a full path. Deprecated. Use --lc-messages-dir instead.

--large-pages

Enable support for large pages

--lc-messages

Set the language used for the error messages.

--lc-messages-dir (-L)

Directory where error messages are

--lc-time-names

Set the language used for the month names and the days of the week.

--local-infile

Enable LOAD DATA LOCAL INFILE (Defaults to on; use --skip-local-infile to disable.)

--locales

Enable or disable LOCALES plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--lock-wait-timeout

Timeout in seconds to wait for a lock before returning an error.

--log-basename

Basename for all log files and the .pid file. This sets all log file names at once (in 'datadir') and is normally the only option you need for specifying log files. Sets names for --log-bin, --log-bin-index, --relay-log, --relay-log-index, --general-log-file, --log-slow-query-log-file, --log-error-file, and --pid-file

--log-bin

Log update queries in binary format. Optional argument should be name for binary log. If not given 'datadir'/'log-basename'-bin or 'datadir'/mysql-bin will be used (the later if --log-basename is not specified). We strongly recommend to use either --log-basename or specify a filename to ensure that replication doesn't stop if the real hostname of the computer changes.

--log-bin-compress

Whether the binary log can be compressed

--log-bin-compress-min-len

Minimum length of sql statement(in statement mode) or record(in row mode)that can be compressed.

--log-bin-index

File that holds the names for last binary log files.

--log-bin-trust-function-creators

If set to FALSE (the default), then when --log-bin is used, creation of a stored function (or trigger) is allowed only to users having the SUPER privilege and only if this stored function (trigger) may not break binary logging. Note that if ALL connections to this server ALWAYS use row-based binary logging, the security issues do not exist and the binary logging cannot break, so you can safely set this to TRUE

--log-disabled-statements

Don't log certain types of statements to general log. Any combination of: slave, sp

--log-error

Log errors to file (instead of stdout). If file name is not specified then 'datadir'/'log-basename'.err or the 'pid-file' path with extension .err is used

--log-isam

Log all MyISAM changes to file.

--log-output

How logs should be written. Any combination of: NONE, FILE, TABLE

--log-queries-not-using-indexes

Log queries that are executed without benefit of any index to the slow log if it is open. Same as log_slow_filter='not_using_index'

--log-short-format

Don't log extra information to update and slow-query logs.

--log-slave-updates

Tells the slave to log the updates from the slave thread to the binary log. You will need to turn it on if you plan to daisy-chain the slaves.

--log-slow-admin-statements

Log slow OPTIMIZE, ANALYZE, ALTER and other administrative statements to the slow log if it is open. Resets or sets the option 'admin' in log_slow_disabled_statements

--log-slow-disabled-statements

Don't log certain types of statements to slow log. Any combination of: admin, call, slave, sp

--log-slow-filter

Log only certain types of queries to the slow log. If variable empty alll kind of queries are logged. All types are bound by slow_query_time, except 'not_using_index' which is always logged if enabled. Any combination of: admin, filesort, filesort_on_disk, filesort_priority_queue, full_join, full_scan, not_using_index, query_cache, query_cache_miss, tmp_table, tmp_table_on_disk

--log-slow-rate-limit

Write to slow log every #th slow query. Set to 1 to log everything. Increase it to reduce the size of the slow or the performance impact of slow logging

--log-slow-slave-statements

Log slow statements executed by slave thread to the slow log if it is open. Resets or sets the option 'slave' in log_slow_disabled_statements

--log-slow-verbosity

Verbosity level for the slow log. Any combination of: innodb, query_plan, explain

--log-tc

Path to transaction coordinator log (used for transactions that affect more than one storage engine, when binary log is disabled).

--log-tc-size

Size of transaction coordinator log.

--log-warnings (-W)

Log some not critical warnings to the general log file.Value can be between 0 and 11. Higher values mean more verbosity

--long-query-time

Log all queries that have taken more than long_query_time seconds to execute to the slow query log file. The argument will be treated as a decimal value with microsecond precision

--low-priority-updates

INSERT/DELETE/UPDATE has lower priority than selects

--lower-case-table-names

If set to 1 table names are stored in lowercase on disk and table names will be case-insensitive. Should be set to 2 if you are using a case insensitive file system

--master-info-file

The location and name of the file that remembers the master and where the I/O replication thread is in the master's binlogs. Defaults to master.info

--master-retry-count

The number of tries the slave will make to connect to the master before giving up.

--master-verify-checksum

Force checksum verification of logged events in the binary log before sending them to slaves or printing them in the output of SHOW BINLOG EVENTS

--max-allowed-packet

Max packet length to send to or receive from the server

--max-binlog-cache-size

Sets the total size of the transactional cache

--max-binlog-size

Binary log will be rotated automatically when the size exceeds this value.

--max-binlog-stmt-cache-size

Sets the total size of the statement cache

--max-connect-errors

If there is more than this number of interrupted connections from a host this host will be blocked from further connections

--max-connections

The number of simultaneous clients allowed

--max-delayed-threads

Don't start more than this number of threads to handle INSERT DELAYED statements. If set to zero INSERT DELAYED will be not used

--max-digest-length

Maximum length considered for digest text.

--max-error-count

Max number of errors/warnings to store for a statement

--max-heap-table-size

Don't allow creation of heap tables bigger than this

--max-join-size

Joins that are probably going to read more than max_join_size records return an error

--max-length-for-sort-data

Max number of bytes in sorted records

--max-password-errors

If there is more than this number of failed connect attempts due to invalid password, user will be blocked from further connections until FLUSH_PRIVILEGES.

--max-prepared-stmt-count

Maximum number of prepared statements in the server

--max-recursive-iterations

Maximum number of iterations when executing recursive queries

--max-relay-log-size

relay log will be rotated automatically when the size exceeds this value. If 0 at startup, it's set to max_binlog_size

--max-rowid-filter-size

The maximum size of the container of a rowid filter

--max-seeks-for-key

Limit assumed max number of seeks when looking up rows based on a key

--max-session-mem-used

Amount of memory a single user session is allowed to allocate. This limits the value of the session variable MEM_USED

--max-sort-length

The number of bytes to use when sorting BLOB or TEXT values (only the first max_sort_length bytes of each value are used; the rest are ignored)

--max-sp-recursion-depth

Maximum stored procedure recursion depth

--max-statement-time

A query that has taken more than max_statement_time seconds will be aborted. The argument will be treated as a decimal value with microsecond precision. A value of 0 (default) means no timeout

--max-tmp-tables

Unused, will be removed.

--max-user-connections

The maximum number of active connections for a single user (0 = no limit)

--max-write-lock-count

After this many write locks, allow some read locks to run in between

--memlock

Lock mysqld in memory.

--metadata-lock-info

Enable or disable METADATA_LOCK_INFO plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--metadata-locks-cache-size

Unused

--metadata-locks-hash-instances

Unused

--min-examined-row-limit

Don't write queries to slow log that examine fewer rows than that

--mrr-buffer-size

Size of buffer to use when using MRR with range access

--myisam-block-size

Block size to be used for MyISAM index pages

--myisam-data-pointer-size

Default pointer size to be used for MyISAM tables

--myisam-max-sort-file-size

Don't use the fast sort index method to created index if the temporary file would get bigger than this

--myisam-mmap-size

Restricts the total memory used for memory mapping of MySQL tables

--myisam-recover-options

Specifies how corrupted tables should be automatically repaired. Any combination of: DEFAULT, BACKUP, FORCE, QUICK, BACKUP_ALL, OFF

--myisam-repair-threads

If larger than 1, when repairing a MyISAM table all indexes will be created in parallel, with one thread per index. The value of 1 disables parallel repair

--myisam-sort-buffer-size

The buffer that is allocated when sorting the index when doing a REPAIR or when creating indexes with CREATE INDEX or ALTER TABLE

--myisam-stats-method

Specifies how MyISAM index statistics collection code should treat NULLs. Possible values of name are NULLS_UNEQUAL (default behavior for 4.1 and later), NULLS_EQUAL (emulate 4.0 behavior), and NULLS_IGNORED

--myisam-use-mmap

Use memory mapping for reading and writing MyISAM tables

--mysql56-temporal-format

Use MySQL-5.6 (instead of MariaDB-5.3) format for TIME, DATETIME, TIMESTAMP columns. (Defaults to on; use --skip-mysql56-temporal-format to disable.)

--net-buffer-length

Buffer length for TCP/IP and socket communication

--net-read-timeout

Number of seconds to wait for more data from a connection before aborting the read

--net-retry-count

If a read on a communication port is interrupted, retry this many times before giving up

--net-write-timeout

Number of seconds to wait for a block to be written to a connection before aborting the write

--no-defaults

Don't read default options from any option file.

--old

Use compatible behavior from previous MariaDB version. See also --old-mode

--old-alter-table

Alias for alter_algorithm. Deprecated. Use --alter-algorithm instead.. One of: DEFAULT, COPY, INPLACE, NOCOPY, INSTANT

--old-mode

Used to emulate old behavior from earlier MariaDB or MySQL versions. Any combination of: NO_DUP_KEY_WARNINGS_WITH_IGNORE, NO_PROGRESS_INFO, ZERO_DATE_TIME_CAST

--old-passwords

Use old password encryption method (needed for 4.0 and older clients)

--old-style-user-limits

Enable old-style user limits (before 5.0.3, user resources were counted per each user+host vs. per account).

--open-files-limit

If this is not 0, then mysqld will use this value to reserve file descriptors to use with setrlimit(). If this value is 0 or autoset then mysqld will reserve max_connections*5 or max_connections + table_cache*2 (whichever is larger) number of file descriptors (Automatically configured unless set explicitly)

--optimizer-prune-level

Controls the heuristic(s) applied during query optimization to prune less-promising partial plans from the optimizer search space. Meaning: 0 - do not apply any heuristic, thus perform exhaustive search; 1 - prune plans based on number of retrieved rows

--optimizer-search-depth

Maximum depth of search performed by the query optimizer. Values larger than the number of relations in a query result in better query plans, but take longer to compile a query. Values smaller than the number of tables in a relation result in faster optimization, but may produce very bad query plans. If set to 0, the system will automatically pick a reasonable value.

--optimizer-selectivity-sampling-limit

Controls number of record samples to check condition selectivity

--optimizer-switch

Fine-tune the optimizer behavior. Takes a comma-separated list of option=value pairs, where value is on, off, or default, and options are: index_merge, index_merge_union, index_merge_sort_union, index_merge_intersection, index_merge_sort_intersection, engine_condition_pushdown, index_condition_pushdown, derived_merge, derived_with_keys, firstmatch, loosescan, materialization, in_to_exists, semijoin, partial_match_rowid_merge, partial_match_table_scan, subquery_cache, mrr, mrr_cost_based, mrr_sort_keys, outer_join_with_cache, semijoin_with_cache, join_cache_incremental, join_cache_hashed, join_cache_bka, optimize_join_buffer_size, table_elimination, extended_keys, exists_to_in, orderby_uses_equalities, condition_pushdown_for_derived, split_materialized, condition_pushdown_for_subquery, rowid_filter, condition_pushdown_from_having, not_null_range_scan

--optimizer-trace

Controls tracing of the Optimizer: optimizer_trace=option=val[,option=val...], where option is one of {enabled} and val is one of {on, off, default}

--optimizer-trace-max-mem-size

Maximum allowed size of an optimizer trace

--optimizer-use-condition-selectivity

Controls selectivity of which conditions the optimizer takes into account to calculate cardinality of a partial join when it searches for the best execution plan Meaning: 1 - use selectivity of index backed range conditions to calculate the cardinality of a partial join if the last joined table is accessed by full table scan or an index scan, 2 - use selectivity of index backed range conditions to calculate the cardinality of a partial join in any case, 3 - additionally always use selectivity of range conditions that are not backed by any index to calculate the cardinality of a partial join, 4 - use histograms to calculate selectivity of range conditions that are not backed by any index to calculate the cardinality of a partial join.5 - additionally use selectivity of certain non-range predicates calculated on record samples

--pam

Enable or disable pam plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--pam-use-cleartext-plugin

Use mysql_cleartext_plugin on the client side instead of the dialog plugin. This may be needed for compatibility reasons, but it only supports simple PAM policies that don't require anything besides a password

--pam-winbind-workaround

Compare usernames case insensitively to work around pam_winbind unconditional username lowercasing

--partition

Enable or disable partition plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--performance-schema

Enable the performance schema.

--performance-schema-accounts-size

Maximum number of instrumented user@host accounts. Use 0 to disable, -1 for automated sizing.

--performance-schema-consumer-events-stages-current

Default startup value for the events_stages_current consumer.

--performance-schema-consumer-events-stages-history

Default startup value for the events_stages_history consumer.

--performance-schema-consumer-events-stages-history-long

Default startup value for the events_stages_history_long consumer.

--performance-schema-consumer-events-statements-current

Default startup value for the events_statements_current consumer.

--performance-schema-consumer-events-statements-history

Default startup value for the events_statements_history consumer.

--performance-schema-consumer-events-statements-history-long

Default startup value for the events_statements_history_long consumer.

--performance-schema-consumer-events-transactions-current

Default startup value for the events_transactions_current consumer.

--performance-schema-consumer-events-transactions-history

Default startup value for the events_transactions_history consumer.

--performance-schema-consumer-events-transactions-history-long

Default startup value for the events_transactions_history_long consumer.

--performance-schema-consumer-events-waits-current

Default startup value for the events_waits_current consumer.

--performance-schema-consumer-events-waits-history

Default startup value for the events_waits_history consumer.

--performance-schema-consumer-events-waits-history-long

Default startup value for the events_waits_history_long consumer.

--performance-schema-consumer-global-instrumentation

Default startup value for the global_instrumentation consumer. (Defaults to on; use --skip-performance-schema-consumer-global-instrumentation to disable.)

--performance-schema-consumer-statements-digest

Default startup value for the statements_digest consumer. (Defaults to on; use --skip-performance-schema-consumer-statements-digest to disable.)

--performance-schema-consumer-thread-instrumentation

Default startup value for the thread_instrumentation consumer. (Defaults to on; use --skip-performance-schema-consumer-thread-instrumentation to disable.)

--performance-schema-digests-size

Size of the statement digest. Use 0 to disable, -1 for automated sizing.

--performance-schema-events-stages-history-long-size

Number of rows in EVENTS_STAGES_HISTORY_LONG. Use 0 to disable, -1 for automated sizing.

--performance-schema-events-stages-history-size

Number of rows per thread in EVENTS_STAGES_HISTORY. Use 0 to disable, -1 for automated sizing.

--performance-schema-events-statements-history-long-size

Number of rows in EVENTS_STATEMENTS_HISTORY_LONG. Use 0 to disable, -1 for automated sizing.

--performance-schema-events-statements-history-size

Number of rows per thread in EVENTS_STATEMENTS_HISTORY. Use 0 to disable, -1 for automated sizing.

--performance-schema-events-transactions-history-long-size

Number of rows in EVENTS_TRANSACTIONS_HISTORY_LONG. Use 0 to disable, -1 for automated sizing.

--performance-schema-events-transactions-history-size

Number of rows per thread in EVENTS_TRANSACTIONS_HISTORY. Use 0 to disable, -1 for automated sizing.

--performance-schema-events-waits-history-long-size

Number of rows in EVENTS_WAITS_HISTORY_LONG. Use 0 to disable, -1 for automated sizing.

--performance-schema-events-waits-history-size

Number of rows per thread in EVENTS_WAITS_HISTORY. Use 0 to disable, -1 for automated sizing.

--performance-schema-hosts-size

Maximum number of instrumented hosts. Use 0 to disable, -1 for automated sizing.

--performance-schema-instrument

Default startup value for a performance schema instrument.

--performance-schema-max-cond-classes

Maximum number of condition instruments.

--performance-schema-max-cond-instances

Maximum number of instrumented condition objects. Use 0 to disable, -1 for automated sizing.

--performance-schema-max-digest-length

Maximum length considered for digest text, when stored in performance_schema tables.

--performance-schema-max-file-classes

Maximum number of file instruments.

--performance-schema-max-file-handles

Maximum number of opened instrumented files.

--performance-schema-max-file-instances

Maximum number of instrumented files. Use 0 to disable, -1 for automated sizing.

--performance-schema-max-index-stat

Maximum number of index statistics for instrumented tables. Use 0 to disable, -1 for automated scaling.

--performance-schema-max-memory-classes

Maximum number of memory pool instruments.

--performance-schema-max-metadata-locks

Maximum number of metadata locks. Use 0 to disable, -1 for automated scaling.

--performance-schema-max-mutex-classes

Maximum number of mutex instruments.

--performance-schema-max-mutex-instances

Maximum number of instrumented MUTEX objects. Use 0 to disable, -1 for automated sizing.

--performance-schema-max-prepared-statements-instances

Maximum number of instrumented prepared statements. Use 0 to disable, -1 for automated scaling.

--performance-schema-max-program-instances

Maximum number of instrumented programs. Use 0 to disable, -1 for automated scaling.

--performance-schema-max-rwlock-classes

Maximum number of rwlock instruments.

--performance-schema-max-rwlock-instances

Maximum number of instrumented RWLOCK objects. Use 0 to disable, -1 for automated sizing.

--performance-schema-max-socket-classes

Maximum number of socket instruments.

--performance-schema-max-socket-instances

Maximum number of opened instrumented sockets. Use 0 to disable, -1 for automated sizing.

--performance-schema-max-sql-text-length

Maximum length of displayed sql text.

--performance-schema-max-stage-classes

Maximum number of stage instruments.

--performance-schema-max-statement-classes

Maximum number of statement instruments.

--performance-schema-max-statement-stack

Number of rows per thread in EVENTS_STATEMENTS_CURRENT.

--performance-schema-max-table-handles

Maximum number of opened instrumented tables. Use 0 to disable, -1 for automated sizing.

--performance-schema-max-table-instances

Maximum number of instrumented tables. Use 0 to disable, -1 for automated sizing.

--performance-schema-max-table-lock-stat

Maximum number of lock statistics for instrumented tables. Use 0 to disable, -1 for automated scaling.

--performance-schema-max-thread-classes

Maximum number of thread instruments.

--performance-schema-max-thread-instances

Maximum number of instrumented threads. Use 0 to disable, -1 for automated sizing.

--performance-schema-session-connect-attrs-size

Size of session attribute string buffer per thread. Use 0 to disable, -1 for automated sizing.

--performance-schema-setup-actors-size

Maximum number of rows in SETUP_ACTORS.

--performance-schema-setup-objects-size

Maximum number of rows in SETUP_OBJECTS.

--performance-schema-users-size

Maximum number of instrumented users. Use 0 to disable, -1 for automated sizing.

--pid-file

Pid file used by safe_mysqld

--plugin-dir

Directory for plugins

--plugin-load

Semicolon-separated list of plugins to load, where each plugin is specified as ether a plugin_name=library_file pair or only a library_file. If the latter case, all plugins from a given library_file will be loaded.

--plugin-load-add

Optional semicolon-separated list of plugins to load. This option adds to the list specified by --plugin-load in an incremental way. It can be specified many times, adding more plugins every time.

--plugin-maturity

The lowest desirable plugin maturity. Plugins less mature than that will not be installed or loaded. One of: unknown, experimental, alpha, beta, gamma, stable

--port (-P)

Port number to use for connection or 0 to default to, my.cnf, $MYSQL_TCP_PORT, /etc/services, built-in default (3306), whatever comes first

--port-open-timeout

Maximum time in seconds to wait for the port to become free. (Default: No wait).

--preload-buffer-size

The size of the buffer that is allocated when preloading indexes

--print-defaults

Print the program argument list and exit.

--profiling-history-size

Number of statements about which profiling information is maintained. If set to 0, no profiles are stored. See SHOW PROFILES.

--progress-report-time

Seconds between sending progress reports to the client for time-consuming statements. Set to 0 to disable progress reporting.

--proxy-protocol-networks

Enable proxy protocol for these source networks. The syntax is a comma separated list of IPv4 and IPv6 networks. If the network doesn't contain mask, it is considered to be a single host. "*" represents all networks and must the only directive on the line. String "localhost" represents non-TCP local connections (Unix domain socket, Windows named pipe or shared memory).

--query-alloc-block-size

Allocation block size for query parsing and execution

--query-cache-limit

Don't cache results that are bigger than this

--query-cache-min-res-unit

The minimum size for blocks allocated by the query cache

--query-cache-size

The memory allocated to store results from old queries

--query-cache-strip-comments

Strip all comments from a query before storing it in the query cache

--query-cache-type

OFF = Don't cache or retrieve results. ON = Cache all results except SELECT SQL_NO_CACHE ... queries. DEMAND = Cache only SELECT SQL_CACHE ... queries

--query-cache-wlock-invalidate

Invalidate queries in query cache on LOCK for write

--query-prealloc-size

Persistent buffer for query parsing and execution

--query-response-time

Enable or disable QUERY_RESPONSE_TIME plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--query-response-time-audit

Enable or disable QUERY_RESPONSE_TIME_AUDIT plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--query-response-time-range-base

Select base of log for query_response_time ranges. WARNING: variable change affect only after flush

--query-response-time-stats

Enable or disable query response time statisics collecting

--range-alloc-block-size

Allocation block size for storing ranges during optimization

--read-binlog-speed-limit

Maximum speed(KB/s) to read binlog from master (0 = no limit)

--read-buffer-size

Each thread that does a sequential scan allocates a buffer of this size for each table it scans. If you do many sequential scans, you may want to increase this value

--read-only

Make all non-temporary tables read-only, with the exception for replication (slave) threads and users with the SUPER privilege

--read-rnd-buffer-size

When reading rows in sorted order after a sort, the rows are read through this buffer to avoid a disk seeks

--relay-log

The location and name to use for relay logs.

--relay-log-index

The location and name to use for the file that keeps a list of the last relay logs

--relay-log-info-file

The location and name of the file that remembers where the SQL replication thread is in the relay logs.

--relay-log-purge

if disabled - do not purge relay logs. if enabled - purge them as soon as they are no more needed. (Defaults to on; use --skip-relay-log-purge to disable.)

--relay-log-recovery

Enables automatic relay log recovery right after the database startup, which means that the IO Thread starts re-fetching from the master right after the last transaction processed.

--relay-log-space-limit

Maximum space to use for all relay logs

--replicate-annotate-row-events

Tells the slave to write annotate rows events received from the master to its own binary log. Ignored if log_slave_updates is not set (Defaults to on; use --skip-replicate-annotate-row-events to disable.)

--replicate-do-db

Tells the slave thread to restrict replication to the specified database. To specify more than one database, use the directive multiple times, once for each database. Note that this will only work if you do not use cross-database queries such as UPDATE some_db.some_table SET foo='bar' while having selected a different or no database. If you need cross database updates to work, make sure you have 3.23.28 or later, and use replicate-wild-do-table=db_name.%.

--replicate-do-table

Tells the slave thread to restrict replication to the specified table. To specify more than one table, use the directive multiple times, once for each table. This will work for cross-database updates, in contrast to replicate-do-db.

--replicate-events-marked-for-skip

Whether the slave should replicate events that were created with @@skip_replication=1 on the master. Default REPLICATE (no events are skipped). Other values are FILTER_ON_SLAVE (events will be sent by the master but ignored by the slave) and FILTER_ON_MASTER (events marked with @@skip_replication=1 will be filtered on the master and never be sent to the slave).

--replicate-ignore-db

Tells the slave thread to not replicate to the specified database. To specify more than one database to ignore, use the directive multiple times, once for each database. This option will not work if you use cross database updates. If you need cross database updates to work, make sure you have 3.23.28 or later, and use replicate-wild-ignore-table=db_name.%.

--replicate-ignore-table

Tells the slave thread to not replicate to the specified table. To specify more than one table to ignore, use the directive multiple times, once for each table. This will work for cross-database updates, in contrast to replicate-ignore-db.

--replicate-rewrite-db

Updates to a database with a different name than the original. Example: replicate-rewrite-db=master_db_name->slave_db_name.

--replicate-same-server-id

In replication, if set to 1, do not skip events having our server id. Default value is 0 (to break infinite loops in circular replication). Can't be set to 1 if --log-slave-updates is used.

--replicate-wild-do-table

Tells the slave thread to restrict replication to the tables that match the specified wildcard pattern. To specify more than one table, use the directive multiple times, once for each table. This will work for cross-database updates. Example: replicate-wild-do-table=foo%.bar% will replicate only updates to tables in all databases that start with foo and whose table names start with bar.

--replicate-wild-ignore-table

Tells the slave thread to not replicate to the tables that match the given wildcard pattern. To specify more than one table to ignore, use the directive multiple times, once for each table. This will work for cross-database updates. Example: replicate-wild-ignore-table=foo%.bar% will not do updates to tables in databases that start with foo and whose table names start with bar.

--report-host

Hostname or IP of the slave to be reported to the master during slave registration. Will appear in the output of SHOW SLAVE HOSTS. Leave unset if you do not want the slave to register itself with the master. Note that it is not sufficient for the master to simply read the IP of the slave off the socket once the slave connects. Due to NAT and other routing issues, that IP may not be valid for connecting to the slave from the master or other hosts

--report-password

The account password of the slave to be reported to the master during slave registration

--report-port

Port for connecting to slave reported to the master during slave registration. Set it only if the slave is listening on a non-default port or if you have a special tunnel from the master or other clients to the slave. If not sure, leave this option unset

--report-user

The account user name of the slave to be reported to the master during slave registration

--require-secure-transport

When this option is enabled, connections attempted using insecure transport will be rejected. Secure transports are SSL/TLS, Unix sockets or named pipes.

--rocksdb

Enable or disable ROCKSDB plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--rocksdb-access-hint-on-compaction-start

DBOptions::access_hint_on_compaction_start for RocksDB

--rocksdb-advise-random-on-open

DBOptions::advise_random_on_open for RocksDB (Defaults to on; use --skip-rocksdb-advise-random-on-open to disable.)

--rocksdb-allow-concurrent-memtable-write

DBOptions::allow_concurrent_memtable_write for RocksDB

--rocksdb-allow-mmap-reads

DBOptions::allow_mmap_reads for RocksDB

--rocksdb-allow-mmap-writes

DBOptions::allow_mmap_writes for RocksDB

--rocksdb-allow-to-start-after-corruption

Allow server still to start successfully even if RocksDB corruption is detected.

--rocksdb-blind-delete-primary-key

Deleting rows by primary key lookup, without reading rows (Blind Deletes). Blind delete is disabled if the table has secondary key

--rocksdb-block-cache-size

block_cache size for RocksDB

--rocksdb-block-restart-interval

BlockBasedTableOptions::block_restart_interval for RocksDB

--rocksdb-block-size

BlockBasedTableOptions::block_size for RocksDB

--rocksdb-block-size-deviation

BlockBasedTableOptions::block_size_deviation for RocksDB

--rocksdb-bulk-load

Use bulk-load mode for inserts. This disables unique_checks and enables rocksdb_commit_in_the_middle.

--rocksdb-bulk-load-allow-sk

Allow bulk loading of sk keys during bulk-load. Can be changed only when bulk load is disabled.

--rocksdb-bulk-load-allow-unsorted

Allow unsorted input during bulk-load. Can be changed only when bulk load is disabled.

--rocksdb-bulk-load-size

Max #records in a batch for bulk-load mode

--rocksdb-bytes-per-sync

DBOptions::bytes_per_sync for RocksDB

--rocksdb-cache-dump

Include RocksDB block cache content in core dump. (Defaults to on; use --skip-rocksdb-cache-dump to disable.)

--rocksdb-cache-high-pri-pool-ratio

Specify the size of block cache high-pri pool

--rocksdb-cache-index-and-filter-blocks

BlockBasedTableOptions::cache_index_and_filter_blocks for RocksDB (Defaults to on; use --skip-rocksdb-cache-index-and-filter-blocks to disable.)

--rocksdb-cache-index-and-filter-with-high-priority

cache_index_and_filter_blocks_with_high_priority for RocksDB (Defaults to on; use --skip-rocksdb-cache-index-and-filter-with-high-priority to disable.)

--rocksdb-cf-options

Enable or disable ROCKSDB_CF_OPTIONS plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--rocksdb-cfstats

Enable or disable ROCKSDB_CFSTATS plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--rocksdb-checksums-pct

How many percentages of rows to be checksummed

--rocksdb-collect-sst-properties

Enables collecting SST file properties on each flush (Defaults to on; use --skip-rocksdb-collect-sst-properties to disable.)

--rocksdb-commit-in-the-middle

Commit rows implicitly every rocksdb_bulk_load_size, on bulk load/insert, update and delete

--rocksdb-commit-time-batch-for-recovery

TransactionOptions::commit_time_batch_for_recovery for RocksDB (Defaults to on; use --skip-rocksdb-commit-time-batch-for-recovery to disable.)

--rocksdb-compact-cf

Compact column family

--rocksdb-compaction-readahead-size

DBOptions::compaction_readahead_size for RocksDB

--rocksdb-compaction-sequential-deletes

RocksDB will trigger compaction for the file if it has more than this number sequential deletes per window

--rocksdb-compaction-sequential-deletes-count-sd

Counting SingleDelete as rocksdb_compaction_sequential_deletes

--rocksdb-compaction-sequential-deletes-file-size

Minimum file size required for compaction_sequential_deletes

--rocksdb-compaction-sequential-deletes-window

Size of the window for counting rocksdb_compaction_sequential_deletes

--rocksdb-compaction-stats

Enable or disable ROCKSDB_COMPACTION_STATS plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--rocksdb-create-checkpoint

Checkpoint directory

--rocksdb-create-if-missing

DBOptions::create_if_missing for RocksDB (Defaults to on; use --skip-rocksdb-create-if-missing to disable.)

--rocksdb-create-missing-column-families

DBOptions::create_missing_column_families for RocksDB

--rocksdb-datadir

RocksDB data directory

--rocksdb-db-write-buffer-size

DBOptions::db_write_buffer_size for RocksDB

--rocksdb-dbstats

Enable or disable ROCKSDB_DBSTATS plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--rocksdb-ddl

Enable or disable ROCKSDB_DDL plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--rocksdb-deadlock

Enable or disable ROCKSDB_DEADLOCK plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--rocksdb-deadlock-detect

Enables deadlock detection

--rocksdb-deadlock-detect-depth

Number of transactions deadlock detection will traverse through before assuming deadlock

--rocksdb-debug-manual-compaction-delay

For debugging purposes only. Sleeping specified seconds for simulating long running compactions.

--rocksdb-debug-optimizer-n-rows

Test only to override rocksdb estimates of table size in a memtable

--rocksdb-debug-optimizer-no-zero-cardinality

In case if cardinality is zero, overrides it with some value (Defaults to on; use --skip-rocksdb-debug-optimizer-no-zero-cardinality to disable.)

--rocksdb-debug-ttl-ignore-pk

For debugging purposes only. If true, compaction filtering will not occur on PK TTL data. This variable is a no-op in non-debug builds.

--rocksdb-debug-ttl-read-filter-ts

For debugging purposes only. Overrides the TTL read filtering time to time + debug_ttl_read_filter_ts. A value of 0 denotes that the variable is not set. This variable is a no-op in non-debug builds.

--rocksdb-debug-ttl-rec-ts

For debugging purposes only. Overrides the TTL of records to now() + debug_ttl_rec_ts. The value can be +/- to simulate a record inserted in the past vs a record inserted in the 'future'. A value of 0 denotes that the variable is not set. This variable is a no-op in non-debug builds.

--rocksdb-debug-ttl-snapshot-ts

For debugging purposes only. Sets the snapshot during compaction to now() + debug_set_ttl_snapshot_ts. The value can be +/- to simulate a snapshot in the past vs a snapshot created in the 'future'. A value of 0 denotes that the variable is not set. This variable is a no-op in non-debug builds.

--rocksdb-default-cf-options

default cf options for RocksDB

--rocksdb-delayed-write-rate

DBOptions::delayed_write_rate

--rocksdb-delete-cf

Delete column family

--rocksdb-delete-obsolete-files-period-micros

DBOptions::delete_obsolete_files_period_micros for RocksDB

--rocksdb-enable-2pc

Enable two phase commit for MyRocks (Defaults to on; use --skip-rocksdb-enable-2pc to disable.)

--rocksdb-enable-bulk-load-api

Enables using SstFileWriter for bulk loading (Defaults to on; use --skip-rocksdb-enable-bulk-load-api to disable.)

--rocksdb-enable-insert-with-update-caching

Whether to enable optimization where we cache the read from a failed insertion attempt in INSERT ON DUPLICATE KEY UPDATE (Defaults to on; use --skip-rocksdb-enable-insert-with-update-caching to disable.)

--rocksdb-enable-thread-tracking

DBOptions::enable_thread_tracking for RocksDB (Defaults to on; use --skip-rocksdb-enable-thread-tracking to disable.)

--rocksdb-enable-ttl

Enable expired TTL records to be dropped during compaction. (Defaults to on; use --skip-rocksdb-enable-ttl to disable.)

--rocksdb-enable-ttl-read-filtering

For tables with TTL, expired records are skipped/filtered out during processing and in query results. Disabling this will allow these records to be seen, but as a result rows may disappear in the middle of transactions as they are dropped during compaction. Use with caution. (Defaults to on; use --skip-rocksdb-enable-ttl-read-filtering to disable.)

--rocksdb-enable-write-thread-adaptive-yield

DBOptions::enable_write_thread_adaptive_yield for RocksDB

--rocksdb-error-if-exists

DBOptions::error_if_exists for RocksDB

--rocksdb-error-on-suboptimal-collation

Raise an error instead of warning if a sub-optimal collation is used (Defaults to on; use --skip-rocksdb-error-on-suboptimal-collation to disable.)

--rocksdb-flush-log-at-trx-commit

Sync on transaction commit. Similar to innodb_flush_log_at_trx_commit. 1: sync on commit, 0,2: not sync on commit

--rocksdb-force-compute-memtable-stats

Force to always compute memtable stats (Defaults to on; use --skip-rocksdb-force-compute-memtable-stats to disable.)

--rocksdb-force-compute-memtable-stats-cachetime

Time in usecs to cache memtable estimates

--rocksdb-force-flush-memtable-and-lzero-now

Acts similar to force_flush_memtable_now, but also compacts all L0 files.

--rocksdb-force-flush-memtable-now

Forces memstore flush which may block all write requests so be careful

--rocksdb-force-index-records-in-range

Used to override the result of records_in_range() when FORCE INDEX is used.

--rocksdb-git-hash

Git revision of the RocksDB library used by MyRocks

--rocksdb-global-info

Enable or disable ROCKSDB_GLOBAL_INFO plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--rocksdb-hash-index-allow-collision

BlockBasedTableOptions::hash_index_allow_collision for RocksDB (Defaults to on; use --skip-rocksdb-hash-index-allow-collision to disable.)

--rocksdb-ignore-unknown-options

Enable ignoring unknown options passed to RocksDB (Defaults to on; use --skip-rocksdb-ignore-unknown-options to disable.)

--rocksdb-index-file-map

Enable or disable ROCKSDB_INDEX_FILE_MAP plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--rocksdb-index-type

BlockBasedTableOptions::index_type for RocksDB. One of: kBinarySearch, kHashSearch

--rocksdb-info-log-level

Filter level for info logs to be written mysqld error log. Valid values include 'debug_level', 'info_level', 'warn_level''error_level' and 'fatal_level'.

--rocksdb-io-write-timeout

Timeout for experimental I/O watchdog.

--rocksdb-is-fd-close-on-exec

DBOptions::is_fd_close_on_exec for RocksDB (Defaults to on; use --skip-rocksdb-is-fd-close-on-exec to disable.)

--rocksdb-keep-log-file-num

DBOptions::keep_log_file_num for RocksDB

--rocksdb-large-prefix

Support large index prefix length of 3072 bytes. If off, the maximum index prefix length is 767.

--rocksdb-lock-scanned-rows

Take and hold locks on rows that are scanned but not updated

--rocksdb-lock-wait-timeout

Number of seconds to wait for lock

--rocksdb-locks

Enable or disable ROCKSDB_LOCKS plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--rocksdb-log-file-time-to-roll

DBOptions::log_file_time_to_roll for RocksDB

--rocksdb-manifest-preallocation-size

DBOptions::manifest_preallocation_size for RocksDB

--rocksdb-manual-compaction-threads

How many rocksdb threads to run for manual compactions

--rocksdb-manual-wal-flush

DBOptions::manual_wal_flush for RocksDB (Defaults to on; use --skip-rocksdb-manual-wal-flush to disable.)

--rocksdb-master-skip-tx-api

Skipping holding any lock on row access. Not effective on slave.

--rocksdb-max-background-jobs

DBOptions::max_background_jobs for RocksDB

--rocksdb-max-latest-deadlocks

Maximum number of recent deadlocks to store

--rocksdb-max-log-file-size

DBOptions::max_log_file_size for RocksDB

--rocksdb-max-manifest-file-size

DBOptions::max_manifest_file_size for RocksDB

--rocksdb-max-manual-compactions

Maximum number of pending + ongoing number of manual compactions.

--rocksdb-max-open-files

DBOptions::max_open_files for RocksDB

--rocksdb-max-row-locks

Maximum number of locks a transaction can have

--rocksdb-max-subcompactions

DBOptions::max_subcompactions for RocksDB

--rocksdb-max-total-wal-size

DBOptions::max_total_wal_size for RocksDB

--rocksdb-merge-buf-size

Size to allocate for merge sort buffers written out to disk during inplace index creation.

--rocksdb-merge-combine-read-size

Size that we have to work with during combine (reading from disk) phase of external sort during fast index creation.

--rocksdb-merge-tmp-file-removal-delay-ms

Fast index creation creates a large tmp file on disk during index creation. Removing this large file all at once when index creation is complete can cause trim stalls on Flash. This variable specifies a duration to sleep (in milliseconds) between calling chsize() to truncate the file in chunks. The chunk size is the same as merge_buf_size.

--rocksdb-new-table-reader-for-compaction-inputs

DBOptions::new_table_reader_for_compaction_inputs for RocksDB

--rocksdb-no-block-cache

BlockBasedTableOptions::no_block_cache for RocksDB

--rocksdb-override-cf-options

option overrides per cf for RocksDB

--rocksdb-paranoid-checks

DBOptions::paranoid_checks for RocksDB (Defaults to on; use --skip-rocksdb-paranoid-checks to disable.)

--rocksdb-pause-background-work

Disable all rocksdb background operations

--rocksdb-perf-context

Enable or disable ROCKSDB_PERF_CONTEXT plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--rocksdb-perf-context-global

Enable or disable ROCKSDB_PERF_CONTEXT_GLOBAL plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--rocksdb-perf-context-level

Perf Context Level for rocksdb internal timer stat collection

--rocksdb-persistent-cache-path

Path for BlockBasedTableOptions::persistent_cache for RocksDB

--rocksdb-persistent-cache-size-mb

Size of cache in MB for BlockBasedTableOptions::persistent_cache for RocksDB

--rocksdb-pin-l0-filter-and-index-blocks-in-cache

pin_l0_filter_and_index_blocks_in_cache for RocksDB (Defaults to on; use --skip-rocksdb-pin-l0-filter-and-index-blocks-in-cache to disable.)

--rocksdb-print-snapshot-conflict-queries

Logging queries that got snapshot conflict errors into *.err log

--rocksdb-rate-limiter-bytes-per-sec

DBOptions::rate_limiter bytes_per_sec for RocksDB

--rocksdb-records-in-range

Used to override the result of records_in_range(). Set to a positive number to override

--rocksdb-remove-mariabackup-checkpoint

Remove mariabackup checkpoint

--rocksdb-reset-stats

Reset the RocksDB internal statistics without restarting the DB.

--rocksdb-rollback-on-timeout

Whether to roll back the complete transaction or a single statement on lock wait timeout (a single statement by default)

--rocksdb-seconds-between-stat-computes

Sets a number of seconds to wait between optimizer stats recomputation. Only changed indexes will be refreshed.

--rocksdb-signal-drop-index-thread

Wake up drop index thread

--rocksdb-sim-cache-size

Simulated cache size for RocksDB

--rocksdb-skip-bloom-filter-on-read

Skip using bloom filter for reads

--rocksdb-skip-fill-cache

Skip filling block cache on read requests

--rocksdb-skip-unique-check-tables

Skip unique constraint checking for the specified tables

--rocksdb-sst-mgr-rate-bytes-per-sec

DBOptions::sst_file_manager rate_bytes_per_sec for RocksDB

--rocksdb-sst-props

Enable or disable ROCKSDB_SST_PROPS plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--rocksdb-stats-dump-period-sec

DBOptions::stats_dump_period_sec for RocksDB

--rocksdb-stats-level

Statistics Level for RocksDB. Default is 0 (kExceptHistogramOrTimers)

--rocksdb-stats-recalc-rate

The number of indexes per second to recalculate statistics for. 0 to disable background recalculation.

--rocksdb-store-row-debug-checksums

Include checksums when writing index/table records

--rocksdb-strict-collation-check

Enforce case sensitive collation for MyRocks indexes (Defaults to on; use --skip-rocksdb-strict-collation-check to disable.)

--rocksdb-strict-collation-exceptions

List of tables (using regex) that are excluded from the case sensitive collation enforcement

--rocksdb-table-cache-numshardbits

DBOptions::table_cache_numshardbits for RocksDB

--rocksdb-table-stats-sampling-pct

Percentage of entries to sample when collecting statistics about table properties. Specify either 0 to sample everything or percentage [1..100]. By default 10% of entries are sampled.

--rocksdb-tmpdir

Directory for temporary files during DDL operations.

--rocksdb-trace-sst-api

Generate trace output in the log for each call to the SstFileWriter

--rocksdb-trx

Enable or disable ROCKSDB_TRX plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--rocksdb-two-write-queues

DBOptions::two_write_queues for RocksDB (Defaults to on; use --skip-rocksdb-two-write-queues to disable.)

--rocksdb-unsafe-for-binlog

Allowing statement based binary logging which may break consistency

--rocksdb-update-cf-options

Option updates per column family for RocksDB

--rocksdb-use-adaptive-mutex

DBOptions::use_adaptive_mutex for RocksDB

--rocksdb-use-clock-cache

Use ClockCache instead of default LRUCache for RocksDB

--rocksdb-use-direct-io-for-flush-and-compaction

DBOptions::use_direct_io_for_flush_and_compaction for RocksDB

--rocksdb-use-direct-reads

DBOptions::use_direct_reads for RocksDB

--rocksdb-use-fsync

DBOptions::use_fsync for RocksDB

--rocksdb-validate-tables

Verify all .frm files match all RocksDB tables (0 means no verification, 1 means verify and fail on error, and 2 means verify but continue

--rocksdb-verify-row-debug-checksums

Verify checksums when reading index/table records

--rocksdb-wal-bytes-per-sync

DBOptions::wal_bytes_per_sync for RocksDB

--rocksdb-wal-dir

DBOptions::wal_dir for RocksDB

--rocksdb-wal-recovery-mode

DBOptions::wal_recovery_mode for RocksDB. Default is kAbsoluteConsistency

--rocksdb-wal-size-limit-mb

DBOptions::WAL_size_limit_MB for RocksDB

--rocksdb-wal-ttl-seconds

DBOptions::WAL_ttl_seconds for RocksDB

--rocksdb-whole-key-filtering

BlockBasedTableOptions::whole_key_filtering for RocksDB (Defaults to on; use --skip-rocksdb-whole-key-filtering to disable.)

--rocksdb-write-batch-max-bytes

Maximum size of write batch in bytes. 0 means no limit.

--rocksdb-write-disable-wal

WriteOptions::disableWAL for RocksDB

--rocksdb-write-ignore-missing-column-families

WriteOptions::ignore_missing_column_families for RocksDB

--rocksdb-write-policy

DBOptions::write_policy for RocksDB. One of: write_committed, write_prepared, write_unprepared

--rowid-merge-buff-size

The size of the buffers used [NOT] IN evaluation via partial matching

--rpl-semi-sync-master-enabled

Enable semi-synchronous replication master (disabled by default).

--rpl-semi-sync-master-timeout

The timeout value (in ms) for semi-synchronous replication in the master

--rpl-semi-sync-master-trace-level

The tracing level for semi-sync replication.

--rpl-semi-sync-master-wait-no-slave

Wait until timeout when no semi-synchronous replication slave available (enabled by default). (Defaults to on; use --skip-rpl-semi-sync-master-wait-no-slave to disable.)

--rpl-semi-sync-master-wait-point

Should transaction wait for semi-sync ack after having synced binlog, or after having committed in storage engine.. One of: AFTER_SYNC, AFTER_COMMIT

--rpl-semi-sync-slave-delay-master

Only write master info file when ack is needed.

--rpl-semi-sync-slave-enabled

Enable semi-synchronous replication slave (disabled by default).

--rpl-semi-sync-slave-kill-conn-timeout

Timeout for the mysql connection used to kill the slave io_thread's connection on master. This timeout comes into play when stop slave is executed.

--rpl-semi-sync-slave-trace-level

The tracing level for semi-sync replication.

--s3

Enable or disable S3 plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--s3-access-key

AWS access key

--s3-block-size

Block size for S3

--s3-bucket

AWS bucket

--s3-debug

Generates trace file from libmarias3 on stderr for debugging

--s3-host-name

AWS host name

--s3-pagecache-age-threshold

This characterizes the number of hits a hot block has to be untouched until it is considered aged enough to be downgraded to a warm block. This specifies the percentage ratio of that number of hits to the total number of blocks in the page cache.

--s3-pagecache-buffer-size

The size of the buffer used for index blocks for S3 tables. Increase this to get better index handling (for all reads and multiple writes) to as much as you can afford.

--s3-pagecache-division-limit

The minimum percentage of warm blocks in key cache

--s3-pagecache-file-hash-size

Number of hash buckets for open files. If you have a lot of S3 files open you should increase this for faster flush of changes. A good value is probably 1/10 of number of possible open S3 files.

--s3-protocol-version

Protocol used to communication with S3. One of "Auto", "Amazon" or "Original".

--s3-region

AWS region

--s3-replicate-alter-as-create-select

When converting S3 table to local table, log all rows in binary log (Defaults to on; use --skip-s3-replicate-alter-as-create-select to disable.)

--s3-secret-key

AWS secret key

--s3-slave-ignore-updates

If the slave has shares same S3 storage as the master

--safe-mode

Skip some optimize stages (for testing). Deprecated.

--safe-user-create

Don't allow new user creation by the user who has no write privileges to the mysql.user table.

--secure-auth

Disallow authentication for accounts that have old (pre-4.1) passwords (Defaults to on; use --skip-secure-auth to disable.)

--secure-file-priv

Limit LOAD DATA, SELECT ... OUTFILE, and LOAD_FILE() to files within specified directory

--secure-timestamp

Restricts direct setting of a session timestamp. Possible levels are: YES - timestamp cannot deviate from the system clock, REPLICATION - replication thread can adjust timestamp to match the master's, SUPER - a user with this privilege and a replication thread can adjust timestamp, NO - historical behavior, anyone can modify session timestamp

--sequence

Enable or disable SEQUENCE plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--server-audit-file-path

Path to the log file.

--server-audit-file-rotate-now

Force log rotation now.

--server-audit-file-rotate-size

Maximum size of the log to start the rotation.

--server-audit-file-rotations

Number of rotations before log is removed.

--server-audit-logging

Turn on/off the logging.

--server-audit-mode

Auditing mode.

--server-audit-output-type

Desired output type. Possible values - 'syslog', 'file' or 'null' as no output.

--server-audit-query-log-limit

Limit on the length of the query string in a record.

--server-audit-reload-filters

Reload filter definitions from tables.

--server-audit-syslog-facility

The 'facility' parameter of the SYSLOG record. The default is LOG_USER.

--server-audit-syslog-ident

The SYSLOG identifier - the beginning of each SYSLOG record.

--server-audit-syslog-info

The <info> string to be added to the SYSLOG record.

--server-audit-syslog-priority

The 'priority' parameter of the SYSLOG record. The default is LOG_INFO.. One of: LOG_EMERG, LOG_ALERT, LOG_CRIT, LOG_ERR, LOG_WARNING, LOG_NOTICE, LOG_INFO, LOG_DEBUG

--server-id

Uniquely identifies the server instance in the community of replication partners

--session-track-schema

Track changes to the default schema. (Defaults to on; use --skip-session-track-schema to disable.)

--session-track-state-change

Track changes to the session state.

--session-track-system-variables

Track changes in registered system variables.

--session-track-transaction-info

Track changes to the transaction attributes. OFF to disable; STATE to track just transaction state (Is there an active transaction? Does it have any data? etc.); CHARACTERISTICS to track transaction state and report all statements needed to start a transaction with the same characteristics (isolation level, read only/read write,snapshot - but not any work done / data modified within the transaction).

--show-slave-auth-info

Show user and password in SHOW SLAVE HOSTS on this master.

--shutdown-wait-for-slaves

when ON, SHUTDOWN command runs with implicit WAIT FOR ALL SLAVES option.

--silent-startup

Don't print [Note] to the error log during startup.

--simple-password-check

Enable or disable simple_password_check plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--simple-password-check-digits

Minimal required number of digits

--simple-password-check-letters-same-case

Minimal required number of letters of the same letter case.This limit is applied separately to upper-case and lower-case letters

--simple-password-check-minimal-length

Minimal required password length

--simple-password-check-other-characters

Minimal required number of other (not letters or digits) characters

--skip-grant-tables

Start without grant tables. This gives all users FULL ACCESS to all tables.

--skip-host-cache

Don't cache host names.

--skip-name-resolve

Don't resolve hostnames. All hostnames are IP's or 'localhost'.

--skip-networking

Don't allow connection with TCP/IP

--skip-show-database

Don't allow 'SHOW DATABASE' commands

--skip-slave-start

If set, slave is not autostarted.

--slave-compressed-protocol

Use compression on master/slave protocol

--slave-ddl-exec-mode

How replication events should be executed. Legal values are STRICT and IDEMPOTENT (default). In IDEMPOTENT mode, replication will not stop for DDL operations that are idempotent. This means that CREATE TABLE is treated as CREATE TABLE OR REPLACE and DROP TABLE is treated as DROP TABLE IF EXISTS.

--slave-domain-parallel-threads

Maximum number of parallel threads to use on slave for events in a single replication domain. When using multiple domains, this can be used to limit a single domain from grabbing all threads and thus stalling other domains. The default of 0 means to allow a domain to grab as many threads as it wants, up to the value of slave_parallel_threads.

--slave-exec-mode

How replication events should be executed. Legal values are STRICT (default) and IDEMPOTENT. In IDEMPOTENT mode, replication will not stop for operations that are idempotent. For example, in row based replication attempts to delete rows that doesn't exist will be ignored. In STRICT mode, replication will stop on any unexpected difference between the master and the slave.

--slave-load-tmpdir

The location where the slave should put its temporary files when replicating a LOAD DATA INFILE command

--slave-max-allowed-packet

The maximum packet length to sent successfully from the master to slave.

--slave-net-timeout

Number of seconds to wait for more data from any master/slave connection before aborting the read

--slave-parallel-max-queued

Limit on how much memory SQL threads should use per parallel replication thread when reading ahead in the relay log looking for opportunities for parallel replication. Only used when --slave-parallel-threads > 0.

--slave-parallel-mode

Controls what transactions are applied in parallel when using --slave-parallel-threads. Possible values: "optimistic" tries to apply most transactional DML in parallel, and handles any conflicts with rollback and retry. "conservative" limits parallelism in an effort to avoid any conflicts. "aggressive" tries to maximise the parallelism, possibly at the cost of increased conflict rate. "minimal" only parallelizes the commit steps of transactions. "none" disables parallel apply completely.

--slave-parallel-threads

If non-zero, number of threads to spawn to apply in parallel events on the slave that were group-committed on the master or were logged with GTID in different replication domains. Note that these threads are in addition to the IO and SQL threads, which are always created by a replication slave

--slave-parallel-workers

Alias for slave_parallel_threads

--slave-run-triggers-for-rbr

Modes for how triggers in row-base replication on slave side will be executed. Legal values are NO (default), YES, LOGGING and ENFORCE. NO means that trigger for RBR will not be running on slave. YES and LOGGING means that triggers will be running on slave, if there was not triggers running on the master for the statement. LOGGING also means results of that the executed triggers work will be written to the binlog. ENFORCE means that triggers will always be run on the slave, even if there are triggers on the master. ENFORCE implies LOGGING.

--slave-skip-errors

Tells the slave thread to continue replication when a query event returns an error from the provided list

--slave-sql-verify-checksum

Force checksum verification of replication events after reading them from relay log. Note: Events are always checksum-verified by slave on receiving them from the network before writing them to the relay log (Defaults to on; use --skip-slave-sql-verify-checksum to disable.)

--slave-transaction-retries

Number of times the slave SQL thread will retry a transaction in case it failed with a deadlock, elapsed lock wait timeout or listed in slave_transaction_retry_errors, before giving up and stopping

--slave-transaction-retry-errors

Tells the slave thread to retry transaction for replication when a query event returns an error from the provided list. Deadlock error, elapsed lock wait timeout, net read error, net read timeout, net write error, net write timeout, connect error and 2 types of lost connection error are automatically added to this list

--slave-transaction-retry-interval

Interval of the slave SQL thread will retry a transaction in case it failed with a deadlock or elapsed lock wait timeout or listed in slave_transaction_retry_errors

--slave-type-conversions

Set of slave type conversions that are enabled. If the variable is empty, no conversions are allowed and it is expected that the types match exactly. Any combination of: ALL_LOSSY, ALL_NON_LOSSY

--slow-launch-time

If creating the thread takes longer than this value (in seconds), the Slow_launch_threads counter will be incremented

--slow-query-log

Log slow queries to a table or log file. Defaults logging to a file 'hostname'-slow.log or a table mysql.slow_log if --log-output=TABLE is used. Must be enabled to activate other slow log options.

--slow-query-log-file

Log slow queries to given log file. Defaults logging to 'hostname'-slow.log. Must be enabled to activate other slow log options

--socket

Socket file to use for connection

--sort-buffer-size

Each thread that needs to do a sort allocates a buffer of this size

--spider

Enable or disable SPIDER plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--spider-alloc-mem

Enable or disable SPIDER_ALLOC_MEM plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--spider-auto-increment-mode

Mode of auto increment.

--spider-bgs-first-read

Number of first read records when background search is used

--spider-bgs-mode

Mode of background search

--spider-bgs-second-read

Number of second read records when background search is used

--spider-bka-engine

Temporary table's engine for BKA

--spider-bka-mode

Mode of BKA for Spider

--spider-bka-table-name-type

The type of temporary table name for bka

--spider-block-size

Index block size

--spider-buffer-size

Buffer size

--spider-bulk-size

Bulk insert size

--spider-bulk-update-mode

The mode of bulk updating and deleting

--spider-bulk-update-size

Bulk update size

--spider-casual-read

Read casually if it is possible

--spider-conn-recycle-mode

Connection recycle mode

--spider-conn-recycle-strict

Strict connection recycle

--spider-conn-wait-timeout

the values, as the max waiting time when spider get a remote conn

--spider-connect-error-interval

Return same error code until interval passes if connection is failed

--spider-connect-mutex

Use mutex at connecting

--spider-connect-retry-count

Connect retry count

--spider-connect-retry-interval

Connect retry interval

--spider-connect-timeout

Wait timeout of connecting to remote server

--spider-crd-bg-mode

Mode of cardinality confirmation at background.

--spider-crd-interval

Interval of cardinality confirmation.(second)

--spider-crd-mode

Mode of cardinality confirmation.

--spider-crd-sync

Cardinality synchronization in partitioned table.

--spider-crd-type

Type of cardinality calculation.

--spider-crd-weight

Weight coefficient to calculate effectiveness of index from cardinality of column.

--spider-delete-all-rows-type

The type of delete_all_rows

--spider-direct-dup-insert

Execute "REPLACE" and "INSERT IGNORE" on remote server and avoid duplicate check on local server

--spider-direct-order-limit

Send 'ORDER BY' and 'LIMIT' to remote server directly

--spider-dry-access

dry access

--spider-error-read-mode

Read error mode if error

--spider-error-write-mode

Write error mode if error

--spider-first-read

Number of first read records

--spider-force-commit

Force prepare, commit, rollback mode

--spider-general-log

Log query to remote server in general log

--spider-index-hint-pushdown

switch to control if push down index hint, like force_index

--spider-init-sql-alloc-size

Initial sql string alloc size

--spider-internal-limit

Internal limit

--spider-internal-offset

Internal offset

--spider-internal-optimize

Execute optimize to remote server

--spider-internal-optimize-local

Execute optimize to remote server with local

--spider-internal-sql-log-off

Manage SQL_LOG_OFF mode statement to the data nodes

--spider-internal-unlock

Unlock tables for using connections in sql

--spider-internal-xa

Use inner xa transaction

--spider-internal-xa-id-type

The type of internal_xa id

--spider-internal-xa-snapshot

Action of inner xa and snapshot both using

--spider-load-crd-at-startup

Load crd from system table at startup

--spider-load-sts-at-startup

Load sts from system table at startup

--spider-local-lock-table

Remote server transmission when lock tables is executed at local

--spider-lock-exchange

Exchange select lock to lock tables

--spider-log-result-error-with-sql

Log sql at logging result errors

--spider-log-result-errors

Log error from remote server in error log

--spider-low-mem-read

Use low memory mode when SQL(SELECT) internally issued to a remote server is executed and get a result list

--spider-max-connections

the values, as the max conncetion from spider to remote mysql. Default 0, mean unlimit the connections

--spider-max-order

Max columns for order by

--spider-multi-split-read

Sprit read mode for multi range

--spider-net-read-timeout

Wait timeout of receiving data from remote server

--spider-net-write-timeout

Wait timeout of sending data to remote server

--spider-ping-interval-at-trx-start

Ping interval at transaction start

--spider-quick-mode

The retrieval result from a remote server is acquired by acquisition one by one

--spider-quick-page-byte

The limitation of memory size in a page when acquisition one by one

--spider-quick-page-size

Number of records in a page when acquisition one by one

--spider-read-only-mode

Read only

--spider-remote-access-charset

Set remote access charset at connecting for improvement performance of connection if you know

--spider-remote-autocommit

Set autocommit mode at connecting for improvement performance of connection if you know

--spider-remote-default-database

Set remote database at connecting for improvement performance of connection if you know

--spider-remote-sql-log-off

Set SQL_LOG_OFF mode on connecting for improved performance of connection, if you know

--spider-remote-time-zone

Set remote time_zone at connecting for improvement performance of connection if you know

--spider-remote-trx-isolation

Set transaction isolation level at connecting for improvement performance of connection if you know

--spider-remote-wait-timeout

Wait timeout on remote server

--spider-reset-sql-alloc

Reset sql string alloc after execute

--spider-same-server-link

Permit one to link same server's table

--spider-second-read

Number of second read records

--spider-select-column-mode

The mode of using columns at select clause

--spider-selupd-lock-mode

Lock for select with update

--spider-semi-split-read

Use offset and limit parameter in SQL for split_read parameter.

--spider-semi-split-read-limit

The limit value for semi_split_read

--spider-semi-table-lock

Table lock during execute a sql

--spider-semi-table-lock-connection

Use different connection if semi_table_lock is enabled

--spider-semi-trx

Take a transaction during execute a sql (Defaults to on; use --skip-spider-semi-trx to disable.)

--spider-semi-trx-isolation

Transaction isolation level during execute a sql

--spider-skip-default-condition

Skip generating internal default condition

--spider-skip-parallel-search

Skip parallel search by specific conditions

--spider-slave-trx-isolation

Transaction isolation level when Spider table is used by slave SQL thread

--spider-split-read

Number of rows at a select

--spider-store-last-crd

Store last crd result into system table

--spider-store-last-sts

Store last sts result into system table

--spider-strict-group-by

Use columns in select clause strictly for group by clause

--spider-sts-bg-mode

Mode of table state confirmation at background.

--spider-sts-interval

Interval of table state confirmation.(second)

--spider-sts-mode

Mode of table state confirmation.

--spider-sts-sync

Table state synchronization in partitioned table.

--spider-support-xa

XA support (Defaults to on; use --skip-spider-support-xa to disable.)

--spider-sync-autocommit

Sync autocommit (Defaults to on; use --skip-spider-sync-autocommit to disable.)

--spider-sync-sql-mode

Sync sql_mode (Defaults to on; use --skip-spider-sync-sql-mode to disable.)

--spider-sync-trx-isolation

Sync transaction isolation level (Defaults to on; use --skip-spider-sync-trx-isolation to disable.)

--spider-table-crd-thread-count

Static thread count of table crd

--spider-table-init-error-interval

Return same error code until interval passes if table init is failed

--spider-table-sts-thread-count

Static thread count of table sts

--spider-udf-ct-bulk-insert-interval

The interval time between bulk insert and next bulk insert at coping

--spider-udf-ct-bulk-insert-rows

The number of rows inserted with bulk insert of one time at coping

--spider-udf-ds-bulk-insert-rows

Number of rows for bulk inserting

--spider-udf-ds-table-loop-mode

Table loop mode if the number of tables in table list are less than the number of result sets

--spider-udf-ds-use-real-table

Use real table for temporary table list

--spider-udf-table-lock-mutex-count

Mutex count of table lock for Spider UDFs

--spider-udf-table-mon-mutex-count

Mutex count of table mon for Spider UDFs

--spider-use-all-conns-snapshot

When start trx with snapshot, it send to all connections

--spider-use-cond-other-than-pk-for-update

Use all conditions even if condition has pk

--spider-use-consistent-snapshot

Use start transaction with consistent snapshot

--spider-use-default-database

Use default database (Defaults to on; use --skip-spider-use-default-database to disable.)

--spider-use-flash-logs

Execute flush logs to remote server

--spider-use-handler

Use handler for reading

--spider-use-pushdown-udf

Remote server transmission existence when UDF is used at condition and "engine_condition_pushdown=1"

--spider-use-snapshot-with-flush-tables

Execute optimize to remote server with local

--spider-use-table-charset

Use table charset for remote access

--spider-wait-timeout

Wait timeout of setting to remote server

--spider-wrapper-protocols

Enable or disable SPIDER_WRAPPER_PROTOCOLS plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--spider-xa-register-mode

Mode of XA transaction register into system table

--sql-mode

Sets the sql mode. Any combination of: REAL_AS_FLOAT, PIPES_AS_CONCAT, ANSI_QUOTES, IGNORE_SPACE, IGNORE_BAD_TABLE_OPTIONS, ONLY_FULL_GROUP_BY, NO_UNSIGNED_SUBTRACTION, NO_DIR_IN_CREATE, POSTGRESQL, ORACLE, MSSQL, DB2, MAXDB, NO_KEY_OPTIONS, NO_TABLE_OPTIONS, NO_FIELD_OPTIONS, MYSQL323, MYSQL40, ANSI, NO_AUTO_VALUE_ON_ZERO, NO_BACKSLASH_ESCAPES, STRICT_TRANS_TABLES, STRICT_ALL_TABLES, NO_ZERO_IN_DATE, NO_ZERO_DATE, ALLOW_INVALID_DATES, ERROR_FOR_DIVISION_BY_ZERO, TRADITIONAL, NO_AUTO_CREATE_USER, HIGH_NOT_PRECEDENCE, NO_ENGINE_SUBSTITUTION, PAD_CHAR_TO_FULL_LENGTH, EMPTY_STRING_IS_NULL, SIMULTANEOUS_ASSIGNMENT, TIME_ROUND_FRACTIONAL

--sql-safe-updates

If set to 1, UPDATEs and DELETEs need either a key in the WHERE clause, or a LIMIT clause, or else they will aborted. Prevents the common mistake of accidentally deleting or updating every row in a table.

--ssl

Enable SSL for connection (automatically enabled if an ssl option is used).

--ssl-ca

CA file in PEM format (check OpenSSL docs, implies --ssl)

--ssl-capath

CA directory (check OpenSSL docs, implies --ssl)

--ssl-cert

X509 cert in PEM format (implies --ssl)

--ssl-cipher

SSL cipher to use (implies --ssl)

--ssl-crl

CRL file in PEM format (check OpenSSL docs, implies --ssl)

--ssl-crlpath

CRL directory (check OpenSSL docs, implies --ssl)

--ssl-key

X509 key in PEM format (implies --ssl)

--stack-trace

Print a symbolic stack trace on failure (Defaults to on; use --skip-stack-trace to disable.)

--standard-compliant-cte

Allow only CTEs compliant to SQL standard (Defaults to on; use --skip-standard-compliant-cte to disable.)

--stored-program-cache

The soft upper limit for number of cached stored routines for one connection.

--strict-password-validation

When password validation plugins are enabled, reject passwords that cannot be validated (passwords specified as a hash) (Defaults to on; use --skip-strict-password-validation to disable.)

--symbolic-links (-s)

Enable symbolic link support. (Defaults to on; use --skip-symbolic-links to disable.)

--sync-binlog

Synchronously flush binary log to disk after every #th event. Use 0 (default) to disable synchronous flushing

--sync-frm

Sync .frm files to disk on creation (Defaults to on; use --skip-sync-frm to disable.)

--sync-master-info

Synchronously flush master info to disk after every #th event. Use 0 to disable synchronous flushing

--sync-relay-log

Synchronously flush relay log to disk after every #th event. Use 0 to disable synchronous flushing

--sync-relay-log-info

Synchronously flush relay log info to disk after every #th transaction. Use 0 to disable synchronous flushing

--sysdate-is-now

Non-default option to alias SYSDATE() to NOW() to make it safe-replicable. Since 5.0, SYSDATE() returns a `dynamic' value different for different invocations, even within the same statement.

--system-versioning-alter-history

Versioning ALTER TABLE mode. ERROR: Fail ALTER with error; KEEP: Keep historical system rows and subject them to ALTER

--table-cache

Deprecated; use --table-open-cache instead.

--table-definition-cache

The number of cached table definitions

--table-open-cache

The number of cached open tables

--table-open-cache-instances

Maximum number of table cache instances

--tc-heuristic-recover

Decision to use in heuristic recover process. One of: OFF, COMMIT, ROLLBACK

--tcp-keepalive-interval

The interval, in seconds, between when successive keep-alive packets are sent if no acknowledgement is received.If set to 0, system dependent default is used. (Automatically configured unless set explicitly)

--tcp-keepalive-probes

The number of unacknowledged probes to send before considering the connection dead and notifying the application layer.If set to 0, system dependent default is used. (Automatically configured unless set explicitly)

--tcp-keepalive-time

Timeout, in seconds, with no activity until the first TCP keep-alive packet is sent.If set to 0, system dependent default is used. (Automatically configured unless set explicitly)

--tcp-nodelay

Set option TCP_NODELAY (disable Nagle's algorithm) on socket (Defaults to on; use --skip-tcp-nodelay to disable.)

--temp-pool

Using this option will cause most temporary files created to use a small set of names, rather than a unique name for each new file. (Defaults to on; use --skip-temp-pool to disable.)

--thread-cache-size

How many threads we should keep in a cache for reuse. These are freed after 5 minutes of idle time

--thread-handling

Define threads usage for handling queries. One of: one-thread-per-connection, no-threads, pool-of-threads

--thread-pool-dedicated-listener

If set to 1,listener thread will not pick up queries

--thread-pool-exact-stats

If set to 1, provides better statistics in information_schema threadpool tables

--thread-pool-groups

Enable or disable THREAD_POOL_GROUPS plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--thread-pool-idle-timeout

Timeout in seconds for an idle thread in the thread pool.Worker thread will be shut down after timeout

--thread-pool-max-threads

Maximum allowed number of worker threads in the thread pool

--thread-pool-oversubscribe

How many additional active worker threads in a group are allowed.

--thread-pool-prio-kickup-timer

The number of milliseconds before a dequeued low-priority statement is moved to the high-priority queue

--thread-pool-priority

Threadpool priority. High priority connections usually start executing earlier than low priority.If priority set to 'auto', the the actual priority(low or high) is determined based on whether or not connection is inside transaction.

--thread-pool-queues

Enable or disable THREAD_POOL_QUEUES plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--thread-pool-size

Number of thread groups in the pool. This parameter is roughly equivalent to maximum number of concurrently executing threads (threads in a waiting state do not count as executing).

--thread-pool-stall-limit

Maximum query execution time in milliseconds,before an executing non-yielding thread is considered stalled.If a worker thread is stalled, additional worker thread may be created to handle remaining clients.

--thread-pool-stats

Enable or disable THREAD_POOL_STATS plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--thread-pool-waits

Enable or disable THREAD_POOL_WAITS plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--thread-stack

The stack size for each thread

--time-format

The TIME format (ignored)

--tls-version

TLS protocol version for secure connections.. Any combination of: TLSv1.0, TLSv1.1, TLSv1.2, TLSv1.3

--tmp-disk-table-size

Max size for data for an internal temporary on-disk MyISAM or Aria table.

--tmp-memory-table-size

If an internal in-memory temporary table exceeds this size, MariaDB will automatically convert it to an on-disk MyISAM or Aria table. Same as tmp_table_size.

--tmp-table-size

Alias for tmp_memory_table_size. If an internal in-memory temporary table exceeds this size, MariaDB will automatically convert it to an on-disk MyISAM or Aria table.

--tmpdir (-t)

Path for temporary files. Several paths may be specified, separated by a colon (:), in this case they are used in a round-robin fashion

--transaction-alloc-block-size

Allocation block size for transactions to be stored in binary log

--transaction-isolation

Default transaction isolation level. One of: READ-UNCOMMITTED, READ-COMMITTED, REPEATABLE-READ, SERIALIZABLE

--transaction-prealloc-size

Persistent buffer for transactions to be stored in binary log

--transaction-read-only

Default transaction access mode. True if transactions are read-only.

--unix-socket

Enable or disable unix_socket plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--updatable-views-with-limit

YES = Don't issue an error message (warning only) if a VIEW without presence of a key of the underlying table is used in queries with a LIMIT clause for updating. NO = Prohibit update of a VIEW, which does not contain a key of the underlying table and the query uses a LIMIT clause (usually get from GUI tools)

--use-stat-tables

Specifies how to use system statistics tables. One of: NEVER, COMPLEMENTARY, PREFERABLY, COMPLEMENTARY_FOR_QUERIES, PREFERABLY_FOR_QUERIES

--user (-u)

Run mysqld daemon as user.

--user-variables

Enable or disable user_variables plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--userstat

Enables statistics gathering for USER_STATISTICS, CLIENT_STATISTICS, INDEX_STATISTICS and TABLE_STATISTICS tables in the INFORMATION_SCHEMA

--verbose (-v)

Used with --help option for detailed help.

--version (-V)

Output version information and exit.

--wait-timeout

The number of seconds the server waits for activity on a connection before closing it

--wsrep-auto-increment-control

To automatically control the assignment of autoincrement variables (Defaults to on; use --skip-wsrep-auto-increment-control to disable.)

--wsrep-black-box-name

The name of the Black Box

--wsrep-black-box-size

The size in bytes of the Black Box

--wsrep-causal-reads

Setting this variable is equivalent to setting wsrep_sync_wait READ flag

--wsrep-certification-rules

Certification rules to use in the cluster. Possible values are: "strict": stricter rules that could result in more certification failures. "optimized": relaxed rules that allow more concurrency and cause less certification failures.

--wsrep-certify-nonPK

Certify tables with no primary key (Defaults to on; use --skip-wsrep-certify-nonPK to disable.)

--wsrep-cluster-address

Address to initially connect to cluster

--wsrep-cluster-name

Name for the cluster

--wsrep-convert-LOCK-to-trx

To convert locking sessions into transactions

--wsrep-data-home-dir

home directory for wsrep provider

--wsrep-dbug-option

DBUG options to provider library

--wsrep-debug

WSREP debug level logging. One of: NONE, SERVER, TRANSACTION, STREAMING, CLIENT

--wsrep-desync

To desynchronize the node from the cluster

--wsrep-dirty-reads

Allow reads even when the node is not in the primary component.

--wsrep-drupal-282555-workaround

Enable a workaround to handle the cases where inserting a DEFAULT value into an auto-increment column could fail with duplicate key error

--wsrep-forced-binlog-format

binlog format to take effect over user's choice. One of: MIXED, STATEMENT, ROW, NONE

--wsrep-gtid-domain-id

When wsrep_gtid_mode is set, this value is used as gtid_domain_id for galera transactions and also copied to the joiner nodes during state transfer. It is ignored, otherwise.

--wsrep-gtid-mode

Automatically update the (joiner) node's wsrep_gtid_domain_id value with that of donor's (received during state transfer) and use it in place of gtid_domain_id for all galera transactions. When OFF (default), wsrep_gtid_domain_id is simply ignored (backward compatibility).

--wsrep-ignore-apply-errors

Ignore replication errors

--wsrep-load-data-splitting

To commit LOAD DATA transaction after every 10K rows inserted (deprecated)

--wsrep-log-conflicts

To log multi-master conflicts

--wsrep-max-ws-rows

Max number of rows in write set

--wsrep-max-ws-size

Max write set size (bytes)

--wsrep-mysql-replication-bundle

mysql replication group commit

--wsrep-new-cluster

Bootstrap a cluster. It works by overriding the current value of wsrep_cluster_address. It is recommended not to add this option to the config file as this will trigger bootstrap on every server start.

--wsrep-node-address

Specifies the node's network address, in the format ip address[:port]. Used in situations where autoguessing is not reliable. As of MariaDB 10.1.8, supports IPv6.

--wsrep-node-incoming-address

Client connection address

--wsrep-node-name

Name of this node. This name can be used in wsrep_sst_donor as a preferred donor. Note that multiple nodes in a cluster can have the same name.

--wsrep-notify-cmd

Defines the command that a Galera node runs whenever cluster membership or the state of the node changes.

--wsrep-on

To enable wsrep replication

--wsrep-OSU-method

Method for Online Schema Upgrade. One of: TOI, RSU, NBO

--wsrep-provider

Path to replication provider library

--wsrep-provider-options

Semicolon (;) separated list of wsrep options (see wsrep_provider_options documentation).

--wsrep-recover

Recover database state after crash and exit

--wsrep-reject-queries

Variable to set to reject queries. One of: NONE, ALL, ALL_KILL

--wsrep-replicate-myisam

To enable myisam replication

--wsrep-restart-slave

Should MariaDB slave be restarted automatically, when node joins back to cluster

--wsrep-retry-autocommit

Max number of times to retry a failed autocommit statement

--wsrep-slave-FK-checks

Should slave thread do foreign key constraint checks (Defaults to on; use --skip-wsrep-slave-FK-checks to disable.)

--wsrep-slave-threads

Number of slave appliers to launch

--wsrep-slave-UK-checks

Should slave thread do secondary index uniqueness checks

--wsrep-SR-store

Storage for streaming replication fragments. One of: none, table

--wsrep-sst-auth

Authentication for SST connection

--wsrep-sst-donor

preferred donor node for the SST

--wsrep-sst-donor-rejects-queries

Reject client queries when donating state snapshot transfer

--wsrep-sst-method

State snapshot transfer method

--wsrep-sst-receive-address

Address where node is waiting for SST contact

--wsrep-start-position

global transaction position to start from

--wsrep-strict-ddl

If set, reject DDL on affected tables not supporting Galera replication

--wsrep-sync-wait

Ensure "synchronous" read view before executing an operation of the type specified by bitmask: 1 - READ(includes SELECT, SHOW and BEGIN/START TRANSACTION); 2 - UPDATE and DELETE; 4 - INSERT and REPLACE

--wsrep-trx-fragment-size

Size of transaction fragments for streaming replication (measured in units of 'wsrep_trx_fragment_unit')

--wsrep-trx-fragment-unit

Unit for streaming replication transaction fragments' size: bytes, rows, statements

--xpand

Enable or disable XPAND plugin. One of: ON, OFF, FORCE (don't start if the plugin fails to load), FORCE_PLUS_PERMANENT (like FORCE, but the plugin can not be uninstalled).

--xpand-balance-algorithm

Method for managing load balancing of Clustrix nodes, can take values FIRST or ROUND_ROBIN. One of: first, round_robin

--xpand-condition-pushdown

--xpand-connect-timeout

Timeout in seconds for connecting to Xpand

--xpand-derived-handler

--xpand-disconnect

Behavior upon broken connection from server to Xpand cluster. Options are DISCONNECT, which will close the server's connection to the client, and ERROR, which will return errors for all subsequent Xpand accesses.

--xpand-enable-direct-delete

--xpand-enable-direct-update

--xpand-hosts

List of xpand hostnames separated by commas, semicolons or spaces

--xpand-master-skip-dml-binlog

If true, DML changes on Xpand tables will not be binlogged

--xpand-password

Xpand password

--xpand-port

Xpand port

--xpand-read-timeout

Timeout in seconds for receiving data from Xpand

--xpand-replicate-alter-as-create-select

When ALTERing Xpand table to local, log all rows in the binary log

--xpand-row-buffer

Xpand rowstore row buffer size

--xpand-select-handler

(Defaults to on; use --skip-xpand-select-handler to disable.)

--xpand-slave-ignore-ddl

If true, slave will not apply DDL for XPand tables

--xpand-socket

Xpand socket

--xpand-upsert-handler

--xpand-username

Xpand user name

--xpand-write-timeout

Timeout in seconds for sending data to Xpand

The following Command-line Options are not present in MariaDB Enterprise Server 10.5.6-4 but are present in one or more older 10.5 ES versions.

Option

Description

--session-track-user-variables

Track changes to user variables.