mysqld Options

This page lists all of the options for mysqld, ordered by topic. For a full alphabetical list of all mysqld options, as well as server and status variables, see Full list of MariaDB options, system and status variables.

In many cases, the entry here is a summary, and links to the full description.

By convention, server variables have usually been specified with an underscore in the configuration files, and a dash on the command line. You can however specify underscores as dashes - they are interchangeable.

See mysqld startup options for which files and groups mysqld reads for it's default options.

Option Prefixes

--autoset-*

• Description: Sets the option value automatically. Only supported for certain options. Available in MariaDB 10.1.7 and later.

--disable-*

• Description: For all boolean options, disables the setting (equivalent to setting it to 0). Same as --skip.

--enable-*

• Description: For all boolean options, enables the setting (equivalent to setting it to 1).

--loose-*

• Description: Don't produce an error if the option doesn't exist.

--maximum-*

• Description: Sets the maximum value for the option.

--skip-*

• Description: For all boolean options, disables the setting (equivalent to setting it to 0). Same as --disable.

Compatibility Options

The following options have been added to MariaDB to make it more compliant with other MariaDB and MySQL versions:

-a, --ansi

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

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--new

• Description: Use new functionality that will exist in next version of MariaDB. This function exists to make it easier to prepare for an upgrade. For version 5.1 this functions enables the LIST and RANGE partitions functions for ndbcluster.

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--old-style-user-limits

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

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--safe-mode

• Description: Disable some potential unsafe optimizations. For 5.2, INSERT DELAYED is disabled, myisam_recover_options is set to DEFAULT (automatically recover crashed MyISAM files) and the query cache is disabled. For Aria tables, disable bulk insert optimization to enable one to use aria_read_log to recover tables even if tables are deleted (good for testing recovery).

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--skip-new

• Description: Disables --new in 5.2. In 5.1 used to disable some new potentially unsafe functions.

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Compatibility Options and System Variables

• --old
• --old-alter-table
• --old-mode
• --old-passwords

Windows Options

--console

• Description: Windows-only option that keeps the console window open and for writing log messages to stderr and stdout. If specified together with --log-error, the last option will take precedence.

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--install

• Description: Windows-only option that installs the mysqld process as a Windows service.
  • The Windows service created with this option auto-starts. If you want a service that is started on demand, then use the --install-manual option.
  • This option takes a service name as an argument. If this option is provided without a service name, then the service name defaults to "MySQL".
  • This option is deprecated and may be removed in a future version. See MDEV-19358 for more information.

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--install-manual

• Description: Windows-only option that installs the mysqld process as a Windows service.
  • The Windows service created with this option is started on demand. If you want a service that auto-starts, use the --install option.
  • This option takes a service name as an argument. If this option is provided without a service name, then the service name defaults to "MySQL".
  • This option is deprecated and may be removed in a future version. See MDEV-19358 for more information.

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--remove

• Description: Windows-only option that removes the Windows service created by the --install or --install-manual options.
  • This option takes a service name as an argument. If this option is provided without a service name, then the service name defaults to "MySQL".
  • This option is deprecated and may be removed in a future version. See MDEV-19358 for more information.

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--slow-start-timeout

• Description: Windows-only option that defines the maximum number of milliseconds that the service control manager should wait before trying to kill the Windows service during startup. Defaults to 15000.

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--standalone

• Description: Windows-only option that serves as a dummy option to start as a standalone server.

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Windows Options and System Variables

The following options and system variables are related to using MariaDB on Windows:

• --named-pipe

Replication and Binary Logging Options

The following options are related to replication and the binary log:

--abort-slave-event-count

• Commandline: --abort-slave-event-count=#
• Description: Option used by mysql-test for debugging and testing of replication.

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--binlog-do-db

• Commandline: --binlog-do-db=name
• Description: This option allows you to configure a replication master to write statements and transactions affecting databases that match a specified name into its binary log. Since the filtered statements or transactions will not be present in the binary log, its replication slaves will not be able to replicate them.
  • This option will not work with cross-database updates with statement-based logging. See the Statement-Based Logging section for more information.
  • This option can not be set dynamically.
  • When setting it on the command-line or in a server option group in an option file, the option does not accept a comma-separated list. If you would like to specify multiple filters, then you need to specify the option multiple times.
  • See Replication Filters for more information.

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--binlog-ignore-db

• Commandline: --binlog-ignore-db=name
• Description: This option allows you to configure a replication master to not write statements and transactions affecting databases that match a specified name into its binary log. Since the filtered statements or transactions will not be present in the binary log, its replication slaves will not be able to replicate them.
  • This option will not work with cross-database updates with statement-based logging. See the Statement-Based Logging section for more information.
  • This option can not be set dynamically.
  • When setting it on the command-line or in a server option group in an option file, the option does not accept a comma-separated list. If you would like to specify multiple filters, then you need to specify the option multiple times.
  • See Replication Filters for more information.

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--binlog-row-event-max-size

• Commandline: --binlog-row-event-max-size=#
• Description: 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.
• Default value
  • 8192 (>= MariaDB 10.2.4)
  • 1024 (<= MariaDB 10.2.3)

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--disconnect-slave-event-count

• Commandline: --disconnect-slave-event-count=#
• Description: Option used by mysql-test for debugging and testing of replication.

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--flashback

• Commandline: --flashback
• Description: Setup the server to use flashback. This enables the binary log and sets binlog_format=ROW.
• Introduced: MariaDB 10.2.4

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--init-rpl-role

• Commandline: --init-rpl-role=name
• Description: Set the replication role.

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--log-basename

• Commandline: --log-basename=name
• Description: 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. This is especially recommended to be set if you are using replication as it ensures that your log file names are not dependent on your host name. 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.
• Introduced: MariaDB 5.2

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--log-bin-trust-routine-creators

• Commandline: --log-bin-trust-routine-creators
• Description: Deprecated, use log-bin-trust-function-creators.

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--master-host

• Commandline: --master-host=name
• Description: Master hostname or IP address for replication. If not set, the slave thread will not be started. Note that the setting of master-host will be ignored if there exists a valid master.info file.

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--master-info-file

• Commandline: --master-info-file=name
• Description: Name and location of the file where the MASTER_LOG_FILE and MASTER_LOG_POS options (i.e. the binary log position on the master) and most other CHANGE MASTER options are written. The slave's I/O thread keeps this binary log position updated as it downloads events.
  • See CHANGE MASTER TO: Option Persistence for more information.

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--master-password

• Commandline: --master-password=name
• Description: The password the slave thread will authenticate with when connecting to the master. If not set, an empty password is assumed. The value in master.info will take precedence if it can be read.

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--master-port

• Commandline: --master-port=#
• Description: The port the master is listening on. If not set, the compiled setting of MYSQL_PORT is assumed. If you have not tinkered with configure options, this should be 3306. The value in master.info will take precedence if it can be read.

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--master-retry-count

• Commandline: --master-retry-count=#
• Description: Number of times a slave will attempt to connect to a master before giving up. The retry interval is determined by the MASTER_CONNECT_RETRY option for the CHANGE MASTER statement. A value of 0 means the slave will not stop attempting to reconnect. Reconnects are triggered when a slave has timed out. See slave_net_timeout.
• Default Value: 86400
• Range - 32 bit: 0 to 4294967295
• Range - 64 bit: 0 to 18446744073709551615

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--master-ssl

• Commandline: --master-ssl
• Description: Enable the slave to connect to the master using TLS.

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--master-ssl-ca

• Commandline: --master-ssl-ca[=name]
• Description: Master TLS CA file. Only applies if you have enabled master-ssl.

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--master-ssl-capath

• Commandline: --master-ssl-capath[=name]
• Description: Master TLS CA path. Only applies if you have enabled master-ssl.

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--master-ssl-cert

• Commandline: --master-ssl-cert[=name]
• Description: Master TLS certificate file name. Only applies if you have enabled master-ssl.

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--master-ssl-cipher

• Commandline: --master-ssl-cipher[=name]
• Description: Master TLS cipher. Only applies if you have enabled master-ssl.

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--master-ssl-key

• Commandline: --master-ssl-key[=name]
• Description: Master TLS keyfile name. Only applies if you have enabled master-ssl.

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--master-user

• Commandline: --master-user=name
• Description: The username the slave thread will use for authentication when connecting to the master. The user must have FILE privilege. If the master user is not set, user test is assumed. The value in master.info will take precedence if it can be read.

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--max-binlog-dump-events

• Commandline: --max-binlog-dump-events=#
• Description: Option used by mysql-test for debugging and testing of replication.

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--replicate-rewrite-db

• Commandline: --replicate-rewrite-db=master_database->slave_database
• Description: This option allows you to configure a replication slave to rewrite database names. It uses the format master_database->slave_database. If a slave encounters a binary log event in which the default database (i.e. the one selected by the USE statement) is master_database, then the slave will apply the event in slave_database instead.
  • This option will not work with cross-database updates with statement-based logging. See the Statement-Based Logging section for more information.
  • This option only affects statements that involve tables. This option does not affect statements involving the database itself, such as CREATE DATABASE, ALTER DATABASE, and DROP DATABASE.
  • This option can not be set dynamically.
  • When setting it on the command-line or in a server option group in an option file, the option does not accept a comma-separated list. If you would like to specify multiple filters, then you need to specify the option multiple times.
  • See Replication Filters for more information.

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--replicate-same-server-id

• Commandline: --replicate-same-server-id
• Description: 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.

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--sporadic-binlog-dump-fail

• Commandline: --sporadic-binlog-dump-fail
• Description: Option used by mysql-test for debugging and testing of replication.

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--sysdate-is-now

• Commandline: --sysdate-is-now
• Description: Non-default option to alias SYSDATE() to NOW() to make it safe for replication. Since 5.0, SYSDATE() has returned a `dynamic' value different for different invocations, even within the same statement.

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Replication and Binary Logging Options and System Variables

The following options and system variables are related to replication and the binary log:

• auto-increment-increment
• auto-increment-offset
• binlog-annotate-row-events
• binlog-cache-size
• binlog-checksum
• binlog-commit-wait-count
• binlog-commit-wait-usec
• binlog-direct-non-transactional-updates|
• binlog-file-cache-size
• binlog-format
• binlog-optimize-thread-scheduling
• binlog-row-image
• binlog-stmt-cache-size
• default-master-connection
• gtid-cleanup-batch-size
• gtid-domain-id
• gtid-ignore-duplicates
• gtid-strict-mode
• init-slave
• log-bin
• log-bin-compress
• log-bin-compress-min-len
• log-bin-index
• log-bin-trust-function-creators
• log-slave-updates
• master-verify-checksum
• max-binlog-cache-size
• max-binlog-size
• max-binlog-stmt-cache-size
• max-relay-log-size
• read-binlog-speed-limit
• relay-log
• relay-log-index
• relay-log-info-file
• relay-log-purge
• relay-log-recovery
• relay-log-space-limit
• replicate-annotate-row-events
• replicate-do-db
• replicate-do-table
• replicate-events-marked-for-skip
• replicate-ignore-db
• replicate-ignore-table
• replicate-wild-do-table
• replicate-wild-ignore-table
• report-host
• report-password
• report-port
• report-user
• rpl-recovery-rank
• server-id
• slave-compressed-protocol
• slave-ddl-exec-mode
• slave-domain-parallel-threads
• slave-exec-mode
• slave-load-tmpdir
• slave-max-allowed-packet
• slave-net-timeout
• slave-parallel-max-queued
• slave-parallel-threads
• slave-run-triggers-for-rbr
• slave-skip-errors
• slave-sql-verify-checksum
• slave-transaction-retries
• slave_transaction_retry_errors
• slave_transaction_retry_interval
• slave-type-conversions
• sync-binlog
• sync-master-info
• sync-relay-log
• sync-relay-log-info

Semisynchronous Replication Options and System Variables

The options and system variables related to Semisynchronous Replication are described here.

Optimizer Options

--record-buffer

• Commandline: --record-buffer=#
• Description: Old alias for read_buffer_size.
• Removed: MariaDB 5.5

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--table-cache

• Commandline: --table-open-cache=#
• Description: Removed; use --table-open-cache instead.
• Removed: MariaDB 5.1.3

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Optimizer Options and System Variables

• alter-algorithm
• analyze-sample-percentage
• big-tables
• bulk-insert-buffer-size
• expensive-subquery-limit
• join-buffer-size
• join-buffer-space-limit
• join-cache-level
• max-heap-table-size
• max-join-size
• max-seeks-for-key
• max-sort-length
• mrr-buffer-size
• optimizer-prune-level
• optimizer-search-depth
• optimizer-selectivity-sampling-limit
• optimizer-switch
• optimizer-trace
• optimizer-trace-max-mem-size
• optimizer-use-condition-selectivity
• query-alloc-block-size
• query-prealloc-size
• range-alloc-block-size
• read-buffer-size
• rowid-merge-buff-size
• table-definition-cache
• table-open-cache
• table-open-cache-instances
• tmp-disk-table-size
• tmp-memory-table-size
• tmp-table-size
• use-stat-tables

Storage Engine Options

MyISAM Storage Engine Options

The options related to the MyISAM storage engine are described below.

--delay-key-write-for-all-tables

• Commandline: --delay-key-write-for-all-tables
• Description: Don't flush key buffers between writes for any MyISAM table. (Deprecated option, use --delay-key-write=all instead.)

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--external-locking

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

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--log-isam

• Commandline: --log-isam[=file_name]
• Description: Enable the MyISAM log, which logs all MyISAM changes to file. If no filename is provided, the default, myisam.log is used.

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MyISAM Storage Engine Options and System Variables

Some options and system variables related to the MyISAM storage engine can be found here. Direct links to many of them can be found below.

• concurrent-insert
• delayed-insert-limit
• delayed-insert-timeout
• delayed-queue-size
• keep-files-on-create
• key-buffer-size
• key-cache-age-threshold
• key-cache-block-size
• key-cache-division-limit
• key-cache-file-hash-size
• key-cache-segments
• myisam-block-size
• myisam-data-pointer-size
• myisam-max-sort-file-size
• myisam-mmap-size
• myisam-recover-options
• myisam-repair-threads
• myisam-sort-buffer-size
• myisam-stats-method
• myisam-use-mmap

InnoDB Storage Engine Options

The options related to the InnoDB storage engine are described below.

--innodb

• Commandline: --innodb=value, --skip-innodb
• Description: This variable controls whether or not to load the InnoDB storage engine. Possible values are ON, OFF, FORCE or FORCE_PLUS_PERMANENT (from MariaDB 5.5). If set to OFF (the same as --skip-innodb), since InnoDB is the default storage engine, the server will not start unless another storage engine has been chosen with --default-storage-engine. FORCE means that the storage engine must be successfully loaded, or else the server won't start. FORCE_PLUS_PERMANENT enables the plugin, but if plugin cannot initialize, the server will not start. In addition, the plugin cannot be uninstalled while the server is running.

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--innodb-cmp

• Commandline: --innodb-cmp
• Description:
• Default: ON

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--innodb-cmp-reset

• Commandline: --innodb-cmp-reset
• Description:
• Default: ON

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--innodb-cmpmem

• Commandline: --innodb-cmpmem
• Description:
• Default: ON

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--innodb-cmpmem-reset

• Commandline: --innodb-cmpmem-reset
• Description:
• Default: ON

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--innodb-file-io-threads

• Commandline: --innodb-file-io-threads
• Description:
• Default: 4
• Removed: MariaDB 10.3.0

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--innodb-index-stats

• Commandline: --innodb-index-stats
• Description:
• Default: ON
• Removed: MariaDB 10.0.0

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--innodb-lock-waits

• Commandline: --innodb-lock-waits
• Description:
• Default: ON

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--innodb-locks

• Commandline: --innodb-locks
• Description:
• Default: ON

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--innodb-rseg

• Commandline: --innodb-rseg
• Description:
• Default: ON
• Removed: MariaDB 10.0.0

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--innodb-status-file

• Commandline: --innodb-status-file
• Description:
• Default: FALSE

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--innodb-sys-indexes

• Commandline: --innodb-sys-indexes
• Description:
• Default: ON

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--innodb-sys-stats

• Commandline: --innodb-sys-stats
• Description:
• Default: ON
• Removed: MariaDB 10.0.0

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--innodb-sys-tables

• Commandline: --innodb-sys-tables
• Description:
• Default: ON

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--innodb-table-stats

• Commandline: --innodb-table-stats
• Description:
• Default: ON
• Removed: MariaDB 10.0.0

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--innodb-trx

• Commandline: --innodb-trx
• Description:
• Default: ON

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InnoDB Storage Engine Options and System Variables

Some options and system variables related to the InnoDB storage engine can be found here. Direct links to many of them can be found below.

• ignore-builtin-innodb
• innodb-adaptive-checkpoint
• innodb-adaptive-flushing
• innodb-adaptive-flushing-lwm
• innodb-adaptive-flushing-method
• innodb-adaptive-hash-index
• innodb-adaptive-hash-index-partitions
• innodb-adaptive-hash-index-parts
• innodb-adaptive-max-sleep-delay
• innodb-additional-mem-pool-size
• innodb-api-bk-commit-interval
• innodb-api-disable-rowlock
• innodb-api-enable-binlog
• innodb-api-enable-mdl
• innodb-api-trx-level
• innodb-auto-lru-dump
• innodb-autoextend-increment
• innodb-autoinc-lock-mode
• innodb-background-scrub-data-check-interval
• innodb-background-scrub-data-compressed
• innodb-background-scrub-data-interval
• innodb-background-scrub-data-uncompressed
• innodb-blocking-buffer-pool-restore
• innodb-buf-dump-status-frequency
• innodb-buffer-pool-chunk-size
• innodb-buffer-pool-dump-at-shutdown
• innodb-buffer-pool-dump-now
• innodb-buffer-pool-dump-pct
• innodb-buffer-pool-evict
• innodb-buffer-pool-filename
• innodb-buffer-pool-instances
• innodb-buffer-pool-load-abort
• innodb-buffer-pool-load-at-startup
• innodb-buffer-pool-load-now
• innodb-buffer-pool-populate
• innodb-buffer-pool-restore-at-startup
• innodb-buffer-pool-shm-checksum
• innodb-buffer-pool-shm-key
• innodb-buffer-pool-size
• innodb-change-buffer-max-size
• innodb-change-buffering
• innodb-change-buffering-debug
• innodb-checkpoint-age-target
• innodb-checksum-algorithm
• innodb-checksums
• innodb-cleaner-lsn-age-factor
• innodb-cmp-per-index-enabled
• innodb-commit-concurrency
• innodb-compression-algorithm
• innodb-compression-failure-threshold-pct
• innodb-compression-level
• innodb-compression-pad-pct-max
• innodb-concurrency-tickets
• innodb-corrupt-table-action
• innodb-data-file-path
• innodb-data-home-dir
• innodb-deadlock-detect
• innodb-default-encryption-key-id
• innodb-default-page-encryption-key
• innodb-default-row-format
• innodb-defragment
• innodb-defragment-fill-factor
• innodb-defragment-fill-factor-n-recs
• innodb-defragment-frequency
• innodb-defragment-n-pages
• innodb-defragment-stats-accuracy
• innodb-dict-size-limit
• innodb_disable_sort_file_cache
• innodb-doublewrite
• innodb-doublewrite-file
• innodb-empty-free-list-algorithm
• innodb-enable-unsafe-group-commit
• innodb-encrypt-log
• innodb-encrypt-tables
• innodb-encryption-rotate-key-age
• innodb-encryption-rotation_iops
• innodb-encryption-threads
• innodb-extra-rsegments
• innodb-extra-undoslots
• innodb-fake-changes
• innodb-fast-checksum
• innodb-fast-shutdown
• innodb-fatal-semaphore-wait-threshold
• innodb-file-format
• innodb-file-format-check
• innodb-file-format-max
• innodb-file-per-table
• innodb-fill-factor
• innodb-flush-log-at-trx-commit
• innodb-flush-method
• innodb-flush-neighbor-pages
• innodb-flush-neighbors
• innodb-flush-sync
• innodb-flushing-avg-loops
• innodb-force-load-corrupted
• innodb-force-primary-key
• innodb-force-recovery
• innodb-foreground-preflush
• innodb-ft-aux-table
• innodb-ft-cache-size
• innodb-ft-enable-diag-print
• innodb-ft-enable-stopword
• innodb-ft-max-token-size
• innodb-ft-min-token-size
• innodb-ft-num-word-optimize
• innodb-ft-result-cache-limit
• innodb-ft-server-stopword-table
• innodb-ft-sort-pll-degree
• innodb-ft-total-cache-size
• innodb-ft-user-stopword-table
• innodb-ibuf-accel-rate
• innodb-ibuf-active-contract
• innodb-ibuf-max-size
• innodb-idle-flush-pct
• innodb-immediate-scrub-data-uncompressed
• innodb-import-table-from-xtrabackup
• innodb-instrument-semaphores
• innodb-io-capacity
• innodb-io-capacity-max
• innodb-large-prefix
• innodb-lazy-drop-table
• innodb-lock-schedule-algorithm
• innodb-locking-fake-changes
• innodb-locks-unsafe-for-binlog
• innodb-log-arch-dir
• innodb-log-arch-expire-sec
• innodb-log-archive
• innodb-log-block-size
• innodb-log-buffer-size
• innodb-log-checksum-algorithm
• innodb-log-checksums
• innodb-log-compressed-pages
• innodb-log-file-size
• innodb-log-files-in-group
• innodb-log-group-home-dir
• innodb-log-optimize-ddl
• innodb-log-write-ahead-size
• innodb-lru-scan-depth
• innodb-max-bitmap-file-size
• innodb-max-changed-pages
• innodb-max-dirty-pages-pct
• innodb-max-dirty-pages-pct-lwm
• innodb-max-purge-lag
• innodb-max-purge-lag-delay
• innodb-max-undo-log-size
• innodb-merge-sort-block-size
• innodb-mirrored-log-groups
• innodb-monitor-disable
• innodb-monitor-enable
• innodb-monitor-reset
• innodb-monitor-reset-all
• innodb-mtflush-threads
• innodb-numa-interleave
• innodb-old-blocks-pct
• innodb-old-blocks-time
• innodb-online-alter-log-max-size
• innodb-open-files
• innodb-optimize-fulltext-only
• innodb-page-cleaners
• innodb-page-size
• innodb-pass-corrupt-table
• innodb-prefix-index-cluster-optimization
• innodb-print-all-deadlocks
• innodb-purge-batch-size
• innodb-purge-rseg-truncate-frequency
• innodb-purge-threads
• innodb-random-read-ahead
• innodb-read-ahead
• innodb-read-ahead-threshold
• innodb-read-io-threads
• innodb-read-only
• innodb-recovery-update-relay-log
• innodb-replication-delay
• innodb-rollback-on-timeout
• innodb-rollback-segments
• innodb-safe-truncate
• innodb-sched-priority-cleaner
• innodb-scrub-log
• innodb-scrub-log-interval
• innodb-scrub-log-speed
• innodb-show-locks-held
• innodb-show-verbose-locks
• innodb-sort-buffer-size
• innodb-spin-wait-delay
• innodb-stats-auto-recalc
• innodb-stats-auto-update
• innodb-stats-include-delete-marked
• innodb-stats-method
• innodb-stats-modified-counter
• innodb-stats-on-metadata
• innodb-stats-persistent
• innodb-stats-persistent-sample-pages
• innodb-stats-sample-pages
• innodb-stats-transient-sample-pages
• innodb-stats-traditional
• innodb-stats-update-need-lock
• innodb-status-output
• innodb-status-output-locks
• innodb-strict-mode
• innodb-support-xa
• innodb-sync-array-size
• innodb-sync-spin-loops
• innodb-table-locks
• innodb-temp-data-file-path
• innodb-thread-concurrency
• innodb-thread-concurrency-timer-based
• innodb-thread-sleep-delay
• innodb-tmpdir
• innodb-track-changed-pages
• innodb-track-redo-log-now
• innodb-undo-directory
• innodb-undo-log-truncate
• innodb-undo-logs
• innodb-undo-tablespaces
• innodb-use-atomic-writes
• innodb-use-fallocate
• innodb-use-global-flush-log-at-trx-commit
• innodb-use-mtflush
• innodb-use-native_aio
• innodb-use-purge-thread
• innodb-use-stacktrace
• innodb-use-sys-malloc
• innodb-use-sys-stats-table
• innodb-use-trim
• innodb-write-io-threads
• skip-innodb
• skip-innodb-checksums
• skip-innodb-doublewrite

Aria Storage Engine Options

The options related to the Aria storage engine are described below.

--aria-log-dir-path

• Commandline: --aria-log-dir-path=value
• Description: Path to the directory where transactional log should be stored
• Default: SAME AS DATADIR

---

Aria Storage Engine Options and System Variables

Some options and system variables related to the Aria storage engine can be found here. Direct links to many of them can be found below.

• aria-block-size
• aria-checkpoint-interval
• aria-checkpoint-log-activity
• aria-encrypt-tables
• aria-force-start-after-recovery-failures
• aria-group-commit
• aria-group-commit-interval
• aria-log-file-size
• aria-log-purge-type
• aria-max-sort-file-size
• aria-page-checksum
• aria-pagecache-age-threshold
• aria-pagecache-buffer-size
• aria-pagecache-division-limit
• aria-pagecache-file-hash-size
• aria-recover
• aria-recover-options
• aria-repair-threads
• aria-sort-buffer-size
• aria-stats-method
• aria-sync-log-dir
• aria-used-for-temp-tables
• deadlock-search-depth-long
• deadlock-search-depth-short
• deadlock-timeout-long
• deadlock-timeout-short

MyRocks Storage Engine Options

The options related to the MyRocks storage engine are described below.

MyRocks Storage Engine Options and System Variables

Some options and system variables related to the MyRocks storage engine can be found here. Direct links to many of them can be found below.

• rocksdb-access-hint-on-compaction-start
• rocksdb-advise-random-on-open
• rocksdb-allow-concurrent-memtable-write
• rocksdb-allow-mmap-reads
• rocksdb-allow-mmap-writes
• rocksdb-background-sync
• rocksdb-base-background-compactions
• rocksdb-blind-delete-primary-key
• rocksdb-block-cache-size
• rocksdb-block-restart-interval
• rocksdb-block-size
• rocksdb-block-size-deviation
• rocksdb-bulk-load
• rocksdb-bulk-load-allow-unsorted
• rocksdb-bulk-load-size
• rocksdb-bytes-per-sync
• rocksdb-cache-index-and-filter-blocks
• rocksdb-checksums-pct
• rocksdb-collect-sst-properties
• rocksdb-commit-in-the-middle
• rocksdb-compact-cf
• rocksdb-compaction-readahead-size
• rocksdb-compaction-sequential-deletes
• rocksdb-compaction-sequential-deletes-count-sd
• rocksdb-compaction-sequential-deletes-file-size
• rocksdb-compaction-sequential-deletes-window
• rocksdb-concurrent-prepare
• rocksdb-create-checkpoint
• rocksdb-create-if-missing
• rocksdb-create-missing-column-families
• rocksdb-datadir
• rocksdb-db-write-buffer-size
• rocksdb-deadlock-detect
• rocksdb-deadlock-detect-depth
• rocksdb-debug-optimizer-no-zero-cardinality
• rocksdb-debug-ttl-ignore-pk
• rocksdb-debug-ttl-read-filter-ts
• rocksdb-debug-ttl-rec_ts
• rocksdb-debug-ttl-snapshot-ts
• rocksdb-default-cf-options
• rocksdb-delayed-write-rate
• rocksdb-delete-obsolete-files-period-micros
• rocksdb-enable-2pc
• rocksdb-enable-bulk-load-api
• rocksdb-enable-thread-tracking
• rocksdb-enable-ttl
• rocksdb-enable-ttl-read-filtering
• rocksdb-enable-write-thread-adaptive-yield
• rocksdb-error-if-exists
• rocksdb-flush-log-at-trx-commit
• rocksdb-flush-memtable-on-analyze
• rocksdb-force-compute-memtable-stats
• rocksdb-force-compute-memtable-stats-cachetime
• rocksdb-force-flush-memtable--and-lzero-now
• rocksdb-force-flush-memtable-now
• rocksdb-force-index-records-in-range
• rocksdb-git-hash
• rocksdb-hash-index-allow-collision
• rocksdb-index-type
• rocksdb-info-log-level
• rocksdb-io-write-timeout
• rocksdb-is-fd-close-on-exec
• rocksdb-keep-log-file-num
• rocksdb-large-prefix
• rocksdb-lock-scanned-rows
• rocksdb-lock-wait-timeout
• rocksdb-log-file-time-to-roll
• rocksdb-manifest-preallocation-size
• rocksdb-manual-wal-flush
• rocksdb-master-skip-tx-api
• rocksdb-max-background-compactions
• rocksdb-max-background-flushes
• rocksdb-max-background-jobs
• rocksdb-max-latest-deadlocks
• rocksdb-max-log-file-size
• rocksdb-max-manifest-file-size
• rocksdb-max-open-files
• rocksdb-max-row-locks
• rocksdb-max-subcompactions
• rocksdb-max-total-wal-size
• rocksdb-merge-buf-size
• rocksdb-merge-combine-read-size
• rocksdb-merge-tmp-file-removal-delay-ms
• rocksdb-new-table-reader-for-compaction-inputs
• rocksdb-no-block-cache
• rocksdb-override-cf-options
• rocksdb-paranoid-checks
• rocksdb-pause-background-work
• rocksdb-perf-context-level
• rocksdb-persistent-cache-path
• rocksdb-persistent-cache-size-mb
• rocksdb-pin-l0-filter-and-index-blocks-in-cache
• rocksdb-print-snapshot-conflict-queries
• rocksdb-rate-limiter-bytes-per-sec
• rocksdb-read-free-rpl-tables
• rocksdb-records-in-range
• rocksdb-reset-stats
• rocksdb-seconds-between-stat-computes
• rocksdb-signal-drop-index-thread
• rocksdb-sim-cache-size
• rocksdb-skip-bloom-filter-on-read
• rocksdb-skip-fill-cache
• rocksdb-skip-unique-check-tables
• rocksdb-sst-mgr-rate-bytes-per-sec
• rocksdb-stats-dump-period-sec
• rocksdb-store-row-debug-checksums
• rocksdb-strict-collation-check
• rocksdb-strict-collation-exceptions
• rocksdb-supported-compression-types
• rocksdb-table-cache-numshardbits
• rocksdb-table-stats-sampling-pct
• rocksdb-tmpdir
• rocksdb-trace-sst-api
• rocksdb-unsafe-for-binlog
• rocksdb-update-cf-options
• rocksdb-use-adaptive-mutex
• rocksdb-use-clock-cache
• rocksdb-use-direct-io-for-flush-and-compaction
• rocksdb-use-direct-reads
• rocksdb-use-fsync
• rocksdb-validate-tables
• rocksdb-verify-row-debug-checksums
• rocksdb-wal-bytes-per-sync
• rocksdb-wal-dir
• rocksdb-wal-recovery-mode
• rocksdb-wal-size-limit-mb
• rocksdb-wal-ttl-seconds
• rocksdb-whole-key-filtering
• rocksdb-write-batch-max-bytes
• rocksdb-write-disable-wal
• rocksdb-write-ignore-missing-column-families

S3 Storage Engine Options

The options and system variables related to the S3 storage engine can be found here.

CONNECT Storage Engine Options

The options related to the CONNECT storage engine are described below.

CONNECT Storage Engine Options and System Variables

Some options and system variables related to the CONNECT storage engine can be found here. Direct links to many of them can be found below.

• connect-class-path
• connect-cond-push
• connect-conv-size
• connect-enable-mongo
• connect-exact-info
• connect-indx-map
• connect-java-wrapper
• connect-json-grp-size
• connect-json-null
• connect-jvm-path
• connect-type-conv
• connect-use-tempfile
• connect-work-size
• connect-xtrace

Spider Storage Engine Options

The options and system variables related to the Spider storage engine can be found here.

Mroonga Storage Engine Options

The options and system variables related to the Mroonga storage engine can be found here.

TokuDB Storage Engine Options

The options and system variables related to the TokuDB storage engine can be found here.

Performance Schema Options

The options related to the Performance Schema are described below.

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

• Commandline: --performance-schema-consumer-events-stages-current
• Description: Enable the events-stages-current consumer.
• Default: OFF

---

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

• Commandline: --performance-schema-consumer-events-stages-history
• Description: Enable the events-stages-history consumer.
• Default: OFF

---

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

• Commandline: --performance-schema-consumer-events-stages-history-long
• Description: Enable the events-stages-history-long consumer.
• Default: OFF

---

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

• Commandline: --performance-schema-consumer-events-statements-current
• Description: Enable the events-statements-current consumer. Use --skip-performance-schema-consumer-events-statements-current to disable.
• Default: ON

---

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

• Commandline: --performance-schema-consumer-events-statements-history
• Description: Enable the events-statements-history consumer.
• Default: OFF

---

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

• Commandline: --performance-schema-consumer-events-statements-history-long
• Description: Enable the events-statements-history-long consumer.
• Default: OFF

---

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

• Commandline: --performance-schema-consumer-events-waits-current
• Description: Enable the events-waits-current consumer.
• Default: OFF

---

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

• Commandline: --performance-schema-consumer-events-waits-history
• Description: Enable the events-waits-history consumer.
• Default: OFF

---

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

• Commandline: --performance-schema-consumer-events-waits-history-long
• Description: Enable the events-waits-history-long consumer.
• Default: OFF

---

--performance-schema-consumer-global-instrumentation

• Commandline: --performance-schema-consumer-global-instrumentation
• Description: Enable the global-instrumentation consumer. Use --skip-performance-schema-consumer-global-instrumentation to disable.
• Default: ON

---

--performance-schema-consumer-statements-digest

• Commandline: --performance-schema-consumer-statements-digest
• Description: Enable the statements-digest consumer. Use --skip-performance-schema-consumer-statements-digest to disable.
• Default: ON

---

--performance-schema-consumer-thread-instrumentation

• Commandline: --performance-schema-consumer-thread-instrumentation
• Description: Enable the statements-thread-instrumentation. Use --skip-performance-schema-thread-instrumentation to disable.
• Default: ON

---

Performance Schema Options and System Variables

Some options and system variables related to the Performance Schema can be found here. Direct links to many of them can be found below.

• performance-schema
• performance-schema-accounts-size
• performance-schema-digests-size
• performance-schema-events-stages-history-long-size
• performance-schema-events-stages-history-size
• performance-schema-events-statements-history-long-size
• performance-schema-events-statements-history-size
• performance-schema-events-waits-history-long-size
• performance-schema-events-waits-history-size
• performance-schema-hosts-size
• performance-schema-max-cond-classes
• performance-schema-max-cond-instances
• performance-schema-max-digest-length
• performance-schema-max-file-classes
• performance-schema-max-file-handles
• performance-schema-max-file-instances
• performance-schema-max-mutex-classes
• performance-schema-max-mutex-instances
• performance-schema-max-rwlock-classes
• performance-schema-max-rwlock-instances
• performance-schema-max-socket-classes
• performance-schema-max-socket-instances
• performance-schema-max-stage-classes
• performance-schema-max-statement-classes
• performance-schema-max-table-handles
• performance-schema-max-table-instances
• performance-schema-max-thread-classes
• performance-schema-max-thread-instances
• performance-schema-session-connect-attrs-size
• performance-schema-setup-actors-size
• performance-schema-setup-objects-size
• performance-schema-users-size

Galera Cluster Options

The options related to Galera Cluster are described below.

--wsrep-new-cluster

• Commandline: --wsrep-new-cluster
• Description: 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.

---

Galera Cluster Options and System Variables

Some options and system variables related to Galera Cluster can be found here. Direct links to many of them can be found below.

• wsrep-auto-increment-control
• wsrep-causal-reads
• wsrep-certify-nonPK
• wsrep-cluster-address
• wsrep-cluster-name
• wsrep-convert-LOCK-to-trx
• wsrep-data-home-dir
• wsrep-dbug-option
• wsrep-debug
• wsrep-desync
• wsrep-dirty-reads
• wsrep-drupal-282555-workaround
• wsrep-forced-binlog-format
• wsrep-gtid-domain-id
• wsrep-gtid-mode
• wsrep-ignore-apply-errors
• wsrep-load-data-splitting
• wsrep-log-conflicts
• wsrep-max-ws-rows
• wsrep-max-ws-rows
• wsrep-mysql-replication-bundle
• wsrep-node-address
• wsrep-node-incoming-address
• wsrep-node-name
• wsrep-notify-cmd
• wsrep-on
• wsrep-OSU-method
• wsrep-provider
• wsrep-provider-options
• wsrep-recover
• wsrep-reject_queries
• wsrep-retry-autocommit
• wsrep-slave-FK-checks
• wsrep-slave-threads
• wsrep-slave-UK-checks
• wsrep-sr-store
• wsrep-sst-auth
• wsrep-sst-donor
• wsrep-sst-donor-rejects-queries
• wsrep-sst-method
• wsrep-sst-receive-address
• wsrep-start-position
• wsrep-sync-wait
• wsrep-trx_fragment_size
• wsrep-trx_fragment_unit

Options When Debugging mysqld

--core-file

• Description: Write core file when mysqld crashes. The file name and location are system dependent; on Linux it is usually called core.pid, written to the data directory.

---

--debug-assert-if-crashed-table

• Description: Do an assert in handler::print_error() if we get a crashed table.

---

--debug-binlog-fsync-sleep

• Description: --debug-binlog-fsync-sleep=#If not set to zero, sets the number of micro-seconds to sleep after running fsync() on the binary log to flush transactions to disk. This can thus be used to artificially increase the perceived cost of such an fsync().

---

--debug-crc-break

• Description: --debug-crc-break=#Call my_debug_put_break_here() if crc matches this number (for debug).

---

--debug-flush

• Description: Default debug log with flush after write.

---

--debug-no-sync

• Description: debug-no-sync[=#]Disables system sync calls. Only for running tests or debugging!

---

--debug-sync-timeout

• Description: debug-sync-timeout[=#]Enable the debug sync facility and optionally specify a default wait timeout in seconds. A zero value keeps the facility disabled.

---

--gdb

• Description: Set up signals usable for debugging.

---

--silent-startup

• Description: Don't print Notes to the error log during startup.
• Introduced: MariaDB 10.1.8

---

--sync-sys

• Description: Enable/disable system sync calls. Syncs should only be turned off (--disable-sync-sys) when running tests or debugging! Replaced by debug-no-sync from MariaDB 5.5.
• Removed: MariaDB 5.5

---

--thread-alarm

• Description: Enable/disable system thread alarm calls. Should only be turned off (--disable-thread-alarm) when running tests or debugging!

---

Debugging Options and System Variables

• debug
• debug-no-thread-alarm

Other Options

--allow-suspicious-udfs

• Commandline: --allow-suspicious-udfs
• Description: Allows use of user-defined functions consisting of only one symbol x() without corresponding x_init() or x_deinit(). That also means that one can load any function from any library, for example exit() from libc.so. Not recommended unless you require old UDF's with one symbol that cannot be recompiled

---

--bootstrap

• Commandline: --bootstrap
• Description: Used by mysql installation scripts, such as mysql_install_db to execute SQL scripts before any privilege or system tables exist. Do no use while an existing MariaDB instance is running.

---

--character-set-client-handshake

• Commandline: --character-set-client-handshake
• Description: Don't ignore client side character set value sent during handshake.

---

--chroot

• Commandline: --chroot=name
• Description: Chroot mysqld daemon during startup.

---

--default-character-set

• Commandline: --default-character-set=name
• Description: Still available as an option for setting the default character set for clients and their connections, it was deprecated and removed in MariaDB 10.2 as a server option. Use character-set-server instead.

---

--default-collation

• Commandline: --default-collation=name
• Description: Set the default collation (deprecated option, use collation-server instead).

---

--defaults-extra-file

• Commandline: --defaults-extra-file=name
• Description: Extra configuration file name. See Configuring MariaDB with my.cnf.

---

--defaults-file

• Commandline: --defaults-file=name
• Description: Configuration file name. Only this file will be read. See Configuring MariaDB with my.cnf.

---

--des-key-file

• Commandline: --des-key-file=name
• Description: Load keys for des_encrypt() and des_encrypt from given file.

---

--enable-locking

• Commandline: --enable-locking
• Description: Deprecated option, use external-locking instead.

---

--exit-info

• Commandline: --exit-info[=#]
• Description: Used for debugging. Use at your own risk.

---

--getopt-prefix-matching

• Commandline: --getopt-prefix-matching={0|1}
• Description: Makes it possible to disable historical "unambiguous prefix" matching in the command-line option parsing.
• Default: TRUE
• Introduced: MariaDB 10.1.3

---

--help

• Commandline: --help
• Description: Displays help with many commandline options described, and exits.

---

--log-long-format

• Commandline: --log-long-format
• Description: Log some extra information to update log. Please note that this option is deprecated; see log-short-format.

---

--log-short-format

• Commandline: --log-short-format
• Description: Don't log extra information to update and slow-query logs.

---

--log-slow-file

• Commandline: --log-slow-file=name
• Description: Log slow queries to given log file. Defaults logging to hostname-slow.log

---

--log-slow-time

• Commandline: --log-slow-time=#
• Description: Log all queries that have taken more than long-query-time seconds to execute to the slow query log, if active. The argument will be treated as a decimal value with microsecond precision.

---

--log-tc

• Commandline: --log-tc=name
• Description: Defines the path to the memory-mapped file-based transaction coordinator log, which is only used if the binary log is disabled. If you have two or more XA-capable storage engines enabled, then a transaction coordinator log must be available. See Transaction Coordinator Log for more information. Also see the the log_tc_size system variable and the --tc-heuristic-recover option.
• Default Value: tc.log

---

--log-update

• Commandline: --log-update[=name]
• Description: The update log is deprecated since version 5.0, is replaced by the binary log and this option just turns on --log-bin instead.

---

--master-connect-retry

• Commandline: --master-connect-retry=#
• Description: Deprecated in 5.1.17 and removed in 5.5. The number of seconds the slave thread will sleep before retrying to connect to the master, in case the master goes down or the connection is lost.

---

--memlock

• Commandline: --memlock
• Description: Lock mysqld in memory.

---

--ndb-use-copying-alter-table

• Commandline: --ndb-use-copying-alter-table
• Description: Force ndbcluster to always copy tables at alter table (should only be used if on-line alter table fails).

---

--no-defaults

• Commandline: --no-defaults
• Description: Don't read default options from any option file. See Configuring MariaDB with my.cnf.

---

--one-thread

• Commandline: --one-thread
• Description: (Deprecated): Only use one thread (for debugging under Linux). Use thread-handling=no-threads instead.

---

--plugin-load

• Commandline: --plugin-load=name
• Description: This option can be used to configure the server to load specific plugins. This option uses the following format:
  • Plugins can be specified in the format name=library, where name is the plugin name and library is the plugin library. This format installs a single plugin from the given plugin library.
  • Plugins can also be specified in the format library, where library is the plugin library. This format installs all plugins from the given plugin library.
  • Multiple plugins can be specified by separating them with semicolons.
• Special care must be taken when specifying the --plugin-load option multiple times, or when specifying both the --plugin-load option and the --plugin-load-add option together. The --plugin-load option resets the plugin load list, and this can cause unexpected problems if you are not aware. The --plugin-load-add option does not reset the plugin load list, so it is much safer to use. See Plugin Overview: Specifying Multiple Plugin Load Options for more information.
• See Plugin Overview: Installing a Plugin with Plugin Load Options for more information.

---

--plugin-load-add

• Commandline: --plugin-load-add=name
• Description: This option can be used to configure the server to load specific plugins. This option uses the following format:
  • Plugins can be specified in the format name=library, where name is the plugin name and library is the plugin library. This format installs a single plugin from the given plugin library.
  • Plugins can also be specified in the format library, where library is the plugin library. This format installs all plugins from the given plugin library.
  • Multiple plugins can be specified by separating them with semicolons.
• Special care must be taken when specifying both the --plugin-load option and the --plugin-load-add option together. The --plugin-load option resets the plugin load list, and this can cause unexpected problems if you are not aware. The --plugin-load-add option does not reset the plugin load list, so it is much safer to use. See Plugin Overview: Specifying Multiple Plugin Load Options for more information.
• See Plugin Overview: Installing a Plugin with Plugin Load Options for more information.
• Introduced: MariaDB 10.0.1

---

--port-open-timeout

• Commandline: --port-open-timeout=#
• Description: Maximum time in seconds to wait for the port to become free. (Default: No wait).

---

--print-defaults

• Commandline: --print-defaults
• Description: Print all options read from option files and exit. See Configuring MariaDB with my.cnf.

---

<<toc-item slug="server-system-variables#proxy_protocol_networks " level=3>>--proxy-protocol-networks<</toc-item>>

--safe-user-create

• Commandline: --safe-user-create
• Description: Don't allow new user creation by the user who has no write privileges to the mysql.user table.

---

--safemalloc-mem-limit

• Commandline: --safemalloc-mem-limit=#
• Description: Simulate memory shortage when compiled with the --with-debug=full option.

---

--set-variable

• Commandline: --set-variable=name
• Description: Change the value of a variable. Please note that this option is deprecated; you can set variables directly with --variable-name=value.

---

--show-slave-auth-info

• Commandline: --show-slave-auth-info
• Description: Show user and password in SHOW SLAVE HOSTS on this master.

---

--skip-grant-tables

• Commandline: --skip-grant-tables
• Description: Start without grant tables. This gives all users FULL ACCESS to all tables, which is useful in case of a lost root password. Use mysqladmin flush-privileges, mysqladmin reload or FLUSH PRIVILEGES to resume using the grant tables.

---

--skip-host-cache

• Commandline: --skip-host-cache
• Description: Don't cache host names.

---

--skip-locking

• Commandline: --skip-locking
• Description: Deprecated option, use skip-external-locking instead.

---

--skip-partition

• Commandline: --skip-partition, --disable-partition
• Description: Disables user-defined partitioning. Previously partitioned tables cannot be accessed or modifed. Tables can still be seen with SHOW TABLES or by viewing the INFORMATION_SCHEMA.TABLES table. Tables can be dropped with DROP TABLE, but this only removes .frm files, not the associated .par files, which will need to be removed manually.

---

--skip-slave-start

• Commandline: --skip-slave-start
• Description: If set, slave is not autostarted.

---

--skip-ssl

• Commandline: --skip-ssl
• Description: Disable TLS connections.

---

--skip-symbolic-links

• Commandline: --skip-symbolic-links
• Description: Don't allow symlinking of tables.

---

--skip-symlink

• Commandline: --skip-symlink
• Description: Don't allow symlinking of tables. Deprecated and removed in MariaDB 5.5. Use[ [#-skip-symbolic-links--skip-symbolic-links]] instead.
• Removed: MariaDB 5.5

---

--skip-thread-priority

• Commandline: --skip-thread-priority
• Description: Don't give threads different priorities. Deprecated and removed in MariaDB 10.0.
• Removed: MariaDB 10.0

---

--sql-bin-update-same

• Commandline: --sql-bin-update-same=#
• Description: The update log was deprecated in version 5.0 and replaced by the binary log, so this option did nothing since then. Deprecated and removed in MariaDB 5.5.
• Removed: MariaDB 5.5

---

--ssl

• Commandline: --ssl
• Description: Enable TLS for connection (automatically enabled with other flags). Disable with '--skip-ssl'.

---

--stack-trace

• Commandline: --stack-trace, --skip-stack-trace
• Description: Print a stack trace on failure. Enabled by default, disable with -skip-stack-trace.

---

--symbolic-links

• Commandline: --symbolic-links
• Description: Enable symbolic link support.

---

--tc-heuristic-recover

• Commandline: --tc-heuristic-recover=name
• Description: If manual heuristic recovery is needed, this option defines the decision to use in the heuristic recovery process. Manual heuristic recovery may be needed if the transaction coordination log is missing or if it doesn't contain all prepared transactions. This option can be set to OFF, COMMIT, or ROLLBACK. The default is OFF. See also the --log-tc server option and the log_tc_size system variable.

---

--temp-pool

• Commandline: --temp-pool
• Description: 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.

---

--test-expect-abort

• Commandline: --test-expect-abort
• Description: Expect that server aborts with 'abort'; Don't write out server variables on 'abort'. Useful only for test scripts.

---

--test-ignore-wrong-options

• Commandline: --test-ignore-wrong-options
• Description: Ignore wrong enums values in command line arguments. Useful only for test scripts.

---

--use-symbolic-links

• Commandline: --use-symbolic-links
• Description: Enable symbolic link support. Deprecated option; use --symbolic-links instead.

---

--user

• Commandline: --user=name
• Description: Run mysqld daemon as user.

---

--verbose

• Commandline: -v, --verbose
• Description: Used with help option for detailed help.

---

--warnings

• Commandline: --warnings[=#]
• Description: Deprecated; use log-warnings instead.

---

Other Options and System Variables

• allow-suspicious-udfs
• automatic-sp-privileges
• back-log
• basedir
• character-set-filesystem
• character-set-server
• character-sets-dir
• check-constraint-checks
• collation-server
• column-compression-threshold
• column-compression-zlib-level
• column-compression-zlib-strategy
• column-compression-zlib-wrap
• completion-type
• connect-timeout
• datadir
• date-format
• datetime-format
• deadlock-search-depth-long
• deadlock-search-depth-short
• deadlock-timeout-long
• deadlock-timeout-short
• default-password-lifetime
• default-regex-flags
• default-storage-engine
• default-table-type
• default-time-zone
• default-week-format
• delay-key-write
• disconnect-on-expired-password
• div-precision-increment
• enable-named-pipe
• encrypt-binlog
• encrypt-tmp-disk-tables
• encrypt-tmp-files
• encryption-algorithm
• engine-condition-pushdown
• eq-range-index-dive-limit
• event-scheduler
• expire-logs-days
• explicit-defaults-for-timestamp
• extra-max-connections
• extra-port
• flush
• flush-time
• ft-boolean-syntax
• ft-max-word-len
• ft-min-word-len
• ft-query-expansion-limit
• ft-stopword-file
• general-log
• general-log-file
• group-concat-max-len
• histogram-size
• histogram-type
• host-cache-size
• idle-readonly-transaction-timeout
• idle-transaction-timeout
• idle-write-transaction-timeout
• ignore-db-dirs
• init-connect
• init-file
• interactive-timeout
• language
• large-pages
• lc-messages
• lc-messages-dir
• lc-time-names
• local-infile
• lock-wait-timeout
• log
• log-disabled-statements
• log-error
• log-output
• log-queries-not-using-indexes
• log-slow-admin-statements
• log-slow-disabled-statements
• log-slow-filter
• log-slow-queries
• log-slow-rate-limit
• log-slow-verbosity
• log-tc-size
• log-warnings
• long-query-time
• low-priority-updates
• lower-case-table-names
• max-allowed-packet
• max-connections
• max-connect-errors
• max-delayed-threads
• max-digest-length
• max-error-count
• max-length-for-sort-data
• max-long-data-size
• max-password-errors
• max-prepared-stmt-count
• max-recursive-iterations
• max-rowid-filter-size
• max-session-mem-used
• max-sp-recursion-depth
• max-statement-time
• max-tmp-tables
• max-user-connections
• max-write-lock-count
• metadata-locks-cache-size
• metadata-locks-hash-instances
• min-examined-row-limit
• mrr-buffer-size
• multi-range-count
• --mysql56-temporal-format
• net-buffer-length
• net-read-timeout
• net-retry-count
• net-write-timeout
• open-files-limit
• pid-file
• plugin-dir
• plugin-maturity
• port
• preload-buffer-size
• profiling-history-size
• progress-report-time
• proxy_protocol_networks
• query-cache-limit
• query-cache-min-res-unit
• query-cache-strip-comments
• query-cache-wlock-invalidate
• read-rnd-buffer-size
• read-only
• safe-show-database
• secure-auth
• secure-file-priv
• secure-timestamp
• session-track-schema
• session-track-state-change
• session-track-system-variables
• session-track-transaction-info
• skip-automatic-sp-privileges
• skip-external-locking
• skip-large-pages
• skip-log-error
• skip-name-resolve
• skip-networking
• skip-show-database
• slow-launch-time
• slow-query-log
• slow-query-log-file
• socket
• sort-buffer-size
• sql-mode
• ssl-ca
• ssl-capath
• ssl-cert
• ssl-cipher
• ssl-crl
• ssl-crlpath
• ssl-key
• standards_compliant_cte
• stored-program-cache
• strict_password_validation
• sync-frm
• system-versioning-alter-history
• system-versioning-asof
• system-versioning-innodb-algorithm-simple
• table-lock-wait-timeout
• tcp-keepalive-interval
• tcp-keepalive-probes
• tcp-keepalive-time
• tcp-nodelay
• thread-cache-size
• thread-concurrency
• thread-handling
• thread-pool-idle-timeout
• thread-pool-max-threads
• thread-pool-min-threads
• thread-pool-oversubscribe
• thread-pool-prio-kickup-timer
• thread-pool-priority
• thread-pool-size
• thread-pool-stall-limit
• thread-stack
• timed-mutexes
• time-format
• tmpdir
• transaction-isolation
• transaction-alloc-block-size
• transaction-prealloc-size
• transaction-read-only
• updatable-views-with-limit
• userstat
• version
• wait-timeout

Authentication Plugins - Options and System Variables

Authentication Plugin - ed25519

The options related to the ed25519 authentication plugin can be found here.

Authentication Plugin - gssapi

The system variables related to the gssapi authentication plugin can be found here.

The options related to the gssapi authentication plugin can be found here.

Authentication Plugin - named_pipe

The options related to the named_pipe authentication plugin can be found here.

Authentication Plugin - pam

The system variables related to the pam authentication plugin can be found here.

The options related to the pam authentication plugin can be found here.

Authentication Plugin - unix_socket

The options related to the unix_socket authentication plugin can be found here.

Encryption Plugins - Options and System Variables

Encryption Plugin - aws_key_management

The system variables related to the aws_key_management encryption plugin can be found here.

The options elated to the aws_key_management encryption plugin can be found here.

Encryption Plugin - file_key_management

The system variables related to the file_key_management encryption plugin can be found here.

The options related to the file_key_management encryption plugin can be found here.

Password Validation Plugins - Options and System Variables

Password Validation Plugin - simple_password_check

The system variables related to the simple_password_check password validation plugin can be found here.

The options related to the simple_password_check password validation plugin can be found here.

Password Validation Plugin - cracklib_password_check

The system variables related to the cracklib_password_check password validation plugin can be found here.

The options related to the cracklib_password_check password validation plugin can be found here.

Audit Plugins - Options and System Variables

Audit Plugin - server_audit

Options and system variables related to the server_audit audit plugin can be found here.

Audit Plugin - SQL_ERROR_LOG

The system variables related to the SQL_ERROR_LOG audit plugin can be found here.

The options related to the SQL_ERROR_LOG audit plugin can be found here.

Audit Plugin - QUERY_RESPONSE_TIME_AUDIT

The options related to the QUERY_RESPONSE_TIME_AUDIT audit plugin can be found here.

Daemon Plugins - Options and System Variables

Daemon Plugin - handlersocket

The options for the HandlerSocket plugin are all described on the HandlerSocket Configuration Option page.

Information Schema Plugins - Options and System Variables

Information Schema Plugin - DISKS

The options related to the DISKS information schema plugin can be found here.

Information Schema Plugin - feedback

The system variables related to the feedback plugin can be found here.

The options related to the feedback plugin can be found here.

Information Schema Plugin - LOCALES

The options related to the LOCALES information schema plugin can be found here.

Information Schema Plugin - METADATA_LOCK_INFO

The options related to the METADATA_LOCK_INFO information schema plugin can be found here.

Information Schema Plugin - QUERY_CACHE_INFO

The options related to the QUERY_CACHE_INFO information schema plugin can be found here.

Information Schema Plugin - QUERY_RESPONSE_TIME

The system variables related to the QUERY_RESPONSE_TIME information schema plugin can be found here.

The options related to the QUERY_RESPONSE_TIME information schema plugin can be found here.

Information Schema Plugin - user_variables

The options related to the user_variables information schema plugin can be found here.

Information Schema Plugin - WSREP_MEMBERSHIP

The options related to the WSREP_MEMBERSHIP information schema plugin can be found here.

Information Schema Plugin - WSREP_STATUS

The options related to the WSREP_STATUS information schema plugin can be found here.

Replication Plugins - Options and System Variables

Replication Plugin - rpl_semi_sync_master

The system variables related to the rpl_semi_sync_master replication plugin can be found here.

The options related to the rpl_semi_sync_master replication plugin can be found here.

Replication Plugin - rpl_semi_sync_slave

The system variables related to the rpl_semi_sync_slave replication plugin can be found here.

The options related to the rpl_semi_sync_slave replication plugin can be found here.

Default Values

You can verify the default values for an option by doing:

mysqld --no-defaults --help --verbose