The most recent release of MariaDB Community Server 10.6 is: 10.6.28 Stable (GA)
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{% endhint %} Download Release Notes Changelog Overview of 10.6 **Release date:** 26 Apr 2021 [MariaDB 10.6](/docs/release-notes/community-server/10.6/what-is-mariadb-106.md) is the current development series of MariaDB. It is an evolution of [MariaDB 10.5](/docs/release-notes/community-server/old-releases/10.5/what-is-mariadb-105.md) with several entirely new features. [MariaDB 10.6.0](/docs/release-notes/community-server/10.6/10.6.0.md) is an [***Alpha***](/docs/release-notes/community-server/about/release-criteria.md) release. {% hint style="danger" %} **Do not use non-stable (non-GA) releases in production!** {% endhint %} Thanks, and enjoy MariaDB! ## Notable Changes This is the first alpha release in the [MariaDB 10.6](/docs/release-notes/community-server/10.6/what-is-mariadb-106.md) series. Notable changes of this release include: ### SQL Syntax * [Indexes can be ignored](/docs/server/ha-and-performance/optimization-and-tuning/optimization-and-indexes/ignored-indexes.md) ([MDEV-7317](https://jira.mariadb.org/browse/MDEV-7317)) * Implement SQL-standard [SELECT ... OFFSET ... FETCH](/docs/server/reference/sql-statements/data-manipulation/selecting-data/select-offset-fetch.md) ([MDEV-23908](https://jira.mariadb.org/browse/MDEV-23908)) * Add [SELECT ... SKIP LOCKED](/docs/server/reference/sql-statements/data-manipulation/selecting-data/select.md#skip-locked) syntax (InnoDB only) ([MDEV-13115](https://jira.mariadb.org/browse/MDEV-13115)) * [JSON\_TABLE](/docs/server/reference/sql-functions/special-functions/json-functions/json_table.md), used to extract JSON data based on a JSON path expression and to return it as a relational table ([MDEV-17399](https://jira.mariadb.org/browse/MDEV-17399)) #### Oracle Compatibility * Anonymous [subqueries in a FROM clause](/docs/server/reference/sql-statements/data-manipulation/selecting-data/subqueries/subqueries-in-a-from-clause-derived-tables.md) (no AS clause) are permitted in [ORACLE mode](/docs/release-notes/community-server/about/compatibility-and-differences/sql_modeoracle.md) ### Storage Engines * TokuDB has been removed ([MDEV-19780](https://jira.mariadb.org/browse/MDEV-19780)) * CassandraSE has been removed ([MDEV-23024](https://jira.mariadb.org/browse/MDEV-23024)) ### InnoDB * Optimization to speed up inserts into an empty table ([MDEV-515](https://jira.mariadb.org/browse/MDEV-515)) * Make [InnoDB's COMPRESSED row format](/docs/server/server-usage/storage-engines/innodb/innodb-row-formats/innodb-compressed-row-format.md) [read-only by default](/docs/server/server-usage/storage-engines/innodb/innodb-row-formats/innodb-compressed-row-format.md#read-only) ([MDEV-23497](https://jira.mariadb.org/browse/MDEV-23497)) * [Information Schema SYS\_TABLESPACES](/docs/server/reference/system-tables/information-schema/information-schema-tables/information-schema-innodb-tables/information-schema-innodb_sys_tablespaces-table.md) now directly reflects the filesystem, and [SYS\_DATAFILES](/docs/server/reference/system-tables/information-schema/information-schema-tables/information-schema-innodb-tables/information-schema-innodb_sys_datafiles-table.md) has been removed ([MDEV-22343](https://jira.mariadb.org/browse/MDEV-22343)) * `innodb_flush_method=O_DIRECT` is enabled by default ([MDEV-24854](https://jira.mariadb.org/browse/MDEV-24854)), and `liburing` replaces `libaio` on recent Linux kernels ([MDEV-24883](https://jira.mariadb.org/browse/MDEV-24883)). * The InnoDB transaction deadlock reporter was improved ([MDEV-24738](https://jira.mariadb.org/browse/MDEV-24738)). * The old [MariaDB 5.5](/docs/release-notes/community-server/old-releases/5.5/changes-improvements-in-mariadb-5-5.md)-compatible `innodb` checksum is no longer supported, only `crc32` and `full_crc32`. Removed the `*innodb` and `*none` options from [innodb\_checksum\_algorithm](/docs/server/server-usage/storage-engines/innodb/innodb-system-variables.md#innodb_checksum_algorithm), and the `--strict-check`/`-C` and `--write`/`-w` options from [innochecksum](/docs/server/clients-and-utilities/administrative-tools/innochecksum.md) ([MDEV-25105](https://jira.mariadb.org/browse/MDEV-25105)) ### Replication, Galera and Binlog * Increase [master\_host](/docs/server/reference/sql-statements/administrative-sql-statements/replication-statements/change-master-to.md#master_host) limit to 255, user to 128 ([MDEV-24312](https://jira.mariadb.org/browse/MDEV-24312)) * The [wsrep\_mode](/docs/galera-cluster/reference/galera-cluster-system-variables.md#wsrep_mode) system variable, for turning on WSREP features which are not part of default behavior (including the experimental Aria replication) ([MDEV-20008](https://jira.mariadb.org/browse/MDEV-20008), [MDEV-20715](https://jira.mariadb.org/browse/MDEV-20715), [MDEV-24946](https://jira.mariadb.org/browse/MDEV-24946)) ### Sys Schema * Bundle [sys-schema](/docs/server/reference/system-tables/sys-schema.md), a collection of views, functions and procedures to help administrators get insight into database usage. ([MDEV-9077](https://jira.mariadb.org/browse/MDEV-9077)) ### Performance Schema * Merged replication instrumentation and tables ([MDEV-16437](https://jira.mariadb.org/browse/MDEV-16437), [MDEV-20220](https://jira.mariadb.org/browse/MDEV-20220)) ### General * Do not resend unchanged resultset metadata for prepared statements ([MDEV-19237](https://jira.mariadb.org/browse/MDEV-19237)) * [--bind-address=hostname](/docs/server/server-management/variables-and-modes/server-system-variables.md#bind_address) now listens on both IPv6 and IPv4 addresses ([MDEV-6536](https://jira.mariadb.org/browse/MDEV-6536)) * Support systemd socket activation ([MDEV-5536](https://jira.mariadb.org/browse/MDEV-5536)) * For the [GSSAPI plugin](/docs/server/reference/plugins/authentication-plugins/authentication-plugin-gssapi.md), support AD or local group name, and SIDs on Windows ([MDEV-23959](https://jira.mariadb.org/browse/MDEV-23959)) * Check for $MARIADB\_HOME/my.cnf ([MDEV-21365](https://jira.mariadb.org/browse/MDEV-21365)) * [max\_recursive\_iterations](/docs/server/server-management/variables-and-modes/server-system-variables.md#max_recursive_iterations) has been reduced to 1000 ([MDEV-17239](https://jira.mariadb.org/browse/MDEV-17239)) * Setting system variables to negative values will no longer set them to the maximum value ([MDEV-22219](https://jira.mariadb.org/browse/MDEV-22219)) ### Galera * [wsrep\_mode](/docs/galera-cluster/reference/galera-cluster-system-variables.md#wsrep_mode) variable for turning on WSREP features which are not part of default behavior. * [wsrep\_strict\_ddl](/docs/galera-cluster/reference/galera-cluster-system-variables.md#wsrep_strict_ddl) has been deprecated. Use [wsrep\_mode=STRICT\_REPLICATION](/docs/galera-cluster/reference/galera-cluster-system-variables.md#wsrep_mode) instead. ### InnoDB Variables The following deprecated variables have been removed ([MDEV-23397](https://jira.mariadb.org/browse/MDEV-23397)): * [innodb\_adaptive\_max\_sleep\_delay](/docs/server/server-usage/storage-engines/innodb/innodb-system-variables.md#innodb_adaptive_max_sleep_delay) * [innodb\_background\_scrub\_data\_check\_interval](/docs/server/server-usage/storage-engines/innodb/innodb-system-variables.md#innodb_background_scrub_data_check_interval) * [innodb\_background\_scrub\_data\_compressed](/docs/server/server-usage/storage-engines/innodb/innodb-system-variables.md#innodb_background_scrub_data_compressed) * [innodb\_background\_scrub\_data\_interval](/docs/server/server-usage/storage-engines/innodb/innodb-system-variables.md#innodb_background_scrub_data_interval) * [innodb\_background\_scrub\_data\_uncompressed](/docs/server/server-usage/storage-engines/innodb/innodb-system-variables.md#innodb_background_scrub_data_uncompressed) * [innodb\_buffer\_pool\_instances](/docs/server/server-usage/storage-engines/innodb/innodb-system-variables.md#innodb_buffer_pool_instances) * [innodb\_commit\_concurrency](/docs/server/server-usage/storage-engines/innodb/innodb-system-variables.md#innodb_commit_concurrency) * [innodb\_concurrency\_tickets](/docs/server/server-usage/storage-engines/innodb/innodb-system-variables.md#innodb_concurrency_tickets) * [innodb\_file\_format](/docs/server/server-usage/storage-engines/innodb/innodb-system-variables.md#innodb_file_format) * [innodb\_large\_prefix](/docs/server/server-usage/storage-engines/innodb/innodb-system-variables.md#innodb_large_prefix) * [innodb\_log\_checksums](/docs/server/server-usage/storage-engines/innodb/innodb-system-variables.md#innodb_log_checksums) * [innodb\_log\_compressed\_pages](/docs/server/server-usage/storage-engines/innodb/innodb-system-variables.md#innodb_log_compressed_pages) * [innodb\_log\_files\_in\_group](/docs/server/server-usage/storage-engines/innodb/innodb-system-variables.md#innodb_log_files_in_group) * [innodb\_log\_optimize\_ddl](/docs/server/server-usage/storage-engines/innodb/innodb-system-variables.md#innodb_log_optimize_ddl) * [innodb\_page\_cleaners](/docs/server/server-usage/storage-engines/innodb/innodb-system-variables.md#innodb_page_cleaners) * [innodb\_replication\_delay](/docs/server/server-usage/storage-engines/innodb/innodb-system-variables.md#innodb_replication_delay) * [innodb\_scrub\_log](/docs/server/server-usage/storage-engines/innodb/innodb-system-variables.md#innodb_scrub_log) * [innodb\_scrub\_log\_speed](/docs/server/server-usage/storage-engines/innodb/innodb-system-variables.md#innodb_scrub_log_speed) * [innodb\_thread\_concurrency](/docs/server/server-usage/storage-engines/innodb/innodb-system-variables.md#innodb_thread_concurrency) * [innodb\_thread\_sleep\_delay](/docs/server/server-usage/storage-engines/innodb/innodb-system-variables.md#innodb_thread_sleep_delay) * [innodb\_undo\_logs](/docs/server/server-usage/storage-engines/innodb/innodb-system-variables.md#innodb_undo_logs) ## Changelog For a complete list of changes made in [MariaDB 10.6.0](/docs/release-notes/community-server/10.6/10.6.0.md), with links to detailed information on each push, see the [changelog](/docs/release-notes/community-server/changelogs/10.6/10.6.0.md). ## Contributors For a full list of contributors to [MariaDB 10.6.0](/docs/release-notes/community-server/10.6/10.6.0.md), see the [MariaDB Foundation release announcement](https://mariadb.org/mariadb-10-6-0-now-available/). **Do not use *****alpha***** releases in production!** {% hint style="info" %} Be notified of new MariaDB Server releases automatically by [subscribing](https://lists.mariadb.org/postorius/lists/announce.lists.mariadb.org/) to the MariaDB Foundation community announce 'at' lists.mariadb.org announcement list (this is a low traffic, announce-only list). 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