# Upgrading from MariaDB 10.5 to MariaDB 10.6 ### How to Upgrade For Windows, see [Upgrading MariaDB on Windows](https://mariadb.com/docs/server/server-management/install-and-upgrade-mariadb/upgrading/platform-specific-upgrade-guides/upgrading-mariadb-on-windows). For MariaDB Galera Cluster, see [Upgrading from MariaDB 10.5 to MariaDB 10.6 with Galera Cluster](https://app.gitbook.com/s/3VYeeVGUV4AMqrA3zwy7/galera-management/upgrading-galera-cluster/upgrading-from-mariadb-10-5-to-mariadb-10-6-with-galera-cluster). Before you upgrade, it would be best to take a backup of your database. This is always a good idea to do before an upgrade. We would recommend [mariadb-backup](https://mariadb.com/docs/server/server-usage/backup-and-restore/mariadb-backup/mariadb-backup-overview). The suggested upgrade procedure is: 1. Modify the repository configuration, so the system's package manager installs [MariaDB 10.6](https://app.gitbook.com/s/aEnK0ZXmUbJzqQrTjFyb/community-server/10.6/what-is-mariadb-106). 1. On Debian, Ubuntu, and other similar Linux distributions, see [Updating the MariaDB APT repository to a New Major Release](https://mariadb.com/docs/server/server-management/installing-mariadb/binary-packages/installing-mariadb-deb-files#updating-the-mariadb-apt-repository-to-a-new-major-release) for more information. 2. On RHEL, CentOS, Fedora, and other similar Linux distributions, see [Updating the MariaDB YUM repository to a New Major Release](https://mariadb.com/docs/server/server-management/installing-mariadb/binary-packages/rpm/yum#updating-the-mariadb-yum-repository-to-a-new-major-release) for more information. 3. On SLES, OpenSUSE, and other similar Linux distributions, see [Updating the MariaDB ZYpp repository to a New Major Release](https://mariadb.com/docs/server/server-management/installing-mariadb/binary-packages/rpm/installing-mariadb-with-zypper#updating-the-mariadb-zypp-repository-to-a-new-major-release) for more information. 2. [Stop MariaDB](https://mariadb.com/docs/server/server-management/starting-and-stopping-mariadb/starting-and-stopping-mariadb-automatically). 3. Uninstall the old version of MariaDB. 1. On Debian, Ubuntu, and other similar Linux distributions, execute the following: `sudo apt-get remove mariadb-server` 2. On RHEL, CentOS, Fedora, and other similar Linux distributions, execute the following: `sudo yum remove MariaDB-server` 3. On SLES, OpenSUSE, and other similar Linux distributions, execute the following: `sudo zypper remove MariaDB-server` 4. Install the new version of MariaDB. 1. On Debian, Ubuntu, and other similar Linux distributions, see [Installing MariaDB Packages with APT](https://mariadb.com/docs/server/server-management/installing-mariadb/binary-packages/installing-mariadb-deb-files#installing-mariadb-packages-with-apt) for more information. 2. On RHEL, CentOS, Fedora, and other similar Linux distributions, see [Installing MariaDB Packages with YUM](https://mariadb.com/docs/server/server-management/installing-mariadb/binary-packages/rpm/yum#installing-mariadb-packages-with-yum) for more information. 3. On SLES, OpenSUSE, and other similar Linux distributions, see [Installing MariaDB Packages with ZYpp](https://mariadb.com/docs/server/server-management/installing-mariadb/binary-packages/rpm/installing-mariadb-with-zypper#installing-mariadb-packages-with-zypp) for more information. 5. Make any desired changes to configuration options in [option files](https://mariadb.com/docs/server/server-management/install-and-upgrade-mariadb/configuring-mariadb/configuring-mariadb-with-option-files), such as `my.cnf`. This includes removing any options that are no longer supported. 6. [Start MariaDB](https://mariadb.com/docs/server/server-management/starting-and-stopping-mariadb/starting-and-stopping-mariadb-automatically). 7. Run [mariadb-upgrade](https://mariadb.com/docs/server/clients-and-utilities/deployment-tools/mariadb-upgrade), to: 1. Ensure that the system tables in the [mysql](https://mariadb.com/docs/server/reference/system-tables/the-mysql-database-tables) database are fully compatible with the new version. 2. Perform a very quick check of all tables and marks them as compatible with the new version of MariaDB. ### Incompatible Changes Between 10.5 and 10.6 On most servers upgrading from 10.5 should be painless. However, there are some things that have changed which could affect an upgrade: The bahaviour of sorting non-deterministic variables in a Select query can be changed ,\ see ([MDEV-27745](https://jira.mariadb.org/browse/MDEV-27745)) #### Reserved Word * New [reserved word](https://mariadb.com/docs/server/reference/sql-structure/sql-language-structure/reserved-words): `OFFSET`. This can no longer be used as an [identifier](https://mariadb.com/docs/server/reference/sql-structure/sql-language-structure/identifier-names) without being quoted. #### InnoDB COMPRESSED Row Format From MariaDB 10.6.0 until MariaDB 10.6.5, tables that are of the `COMPRESSED` row format are read-only by default. This was intended to be the first step towards removing write support and deprecating the feature. This plan has been scrapped, and from MariaDB 10.6.6, `COMPRESSED` tables are no longer read-only by default. From MariaDB 10.6.0 to MariaDB 10.6.5, set the [innodb\_read\_only\_compressed](https://mariadb.com/docs/server/server-usage/storage-engines/innodb/innodb-system-variables#innodb_read_only_compressed) variable to `OFF` to make the tables writable. #### Character Sets From MariaDB 10.6, the `utf8` [character set](https://mariadb.com/docs/server/reference/data-types/string-data-types/character-sets) (and related collations) is by default an alias for `utf8mb3` rather than the other way around. It can be set to imply `utf8mb4` by changing the value of the [old\_mode](https://mariadb.com/docs/server/variables-and-modes/server-system-variables#old_mode) system variable. #### Options That Have Changed Default Values | Option | Old default value | New default value | | ---------------------------------------------------------------------------------------------------------------------------------------- | ----------------- | ----------------- | | [character\_set\_client](https://mariadb.com/docs/server/variables-and-modes/server-system-variables#character_set_client) | utf8 | utf8mb3 | | [character\_set\_connection](https://mariadb.com/docs/server/variables-and-modes/server-system-variables#character_set_connection) | utf8 | utf8mb3 | | [character\_set\_results](https://mariadb.com/docs/server/variables-and-modes/server-system-variables#character_set_results) | utf8 | utf8mb3 | | [character\_set\_system](https://mariadb.com/docs/server/variables-and-modes/server-system-variables#character_set_system) | utf8 | utf8mb3 | | [innodb\_flush\_method](https://mariadb.com/docs/server/server-usage/storage-engines/innodb/innodb-system-variables#innodb_flush_method) | fsync | O\_DIRECT | | [old\_mode](https://mariadb.com/docs/server/variables-and-modes/server-system-variables#old_mode) | Empty | UTF8\_IS\_UTF8MB3 | #### Options That Have Been Removed or Renamed The following options should be removed or renamed if you use them in your [option files](https://mariadb.com/docs/server/server-management/install-and-upgrade-mariadb/configuring-mariadb/configuring-mariadb-with-option-files): | Option | Reason | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | [innodb\_adaptive\_max\_sleep\_delay](https://mariadb.com/docs/server/server-usage/storage-engines/innodb/innodb-system-variables#innodb_adaptive_max_sleep_delay) | | | [innodb\_background\_scrub\_data\_check\_interval](https://mariadb.com/docs/server/server-usage/storage-engines/innodb/innodb-system-variables#innodb_background_scrub_data_check_interval) | | | [innodb\_background\_scrub\_data\_compressed](https://mariadb.com/docs/server/server-usage/storage-engines/innodb/innodb-system-variables#innodb_background_scrub_data_compressed) | | | [innodb\_background\_scrub\_data\_interval](https://mariadb.com/docs/server/server-usage/storage-engines/innodb/innodb-system-variables#innodb_background_scrub_data_interval) | | | [innodb\_background\_scrub\_data\_uncompressed](https://mariadb.com/docs/server/server-usage/storage-engines/innodb/innodb-system-variables#innodb_background_scrub_data_uncompressed) | | | [innodb\_buffer\_pool\_instances](https://mariadb.com/docs/server/server-usage/storage-engines/innodb/innodb-system-variables#innodb_buffer_pool_instances) | | | [innodb\_checksum\_algorithm](https://mariadb.com/docs/server/server-usage/storage-engines/innodb/innodb-system-variables#innodb_checksum_algorithm) | The variable is still present, but the \*innodb and \*none options have been removed as the crc32 algorithm only is supported from [MariaDB 10.6](https://app.gitbook.com/s/aEnK0ZXmUbJzqQrTjFyb/community-server/10.6/what-is-mariadb-106). | | [innodb\_commit\_concurrency](https://mariadb.com/docs/server/server-usage/storage-engines/innodb/innodb-system-variables#innodb_commit_concurrency) | | | [innodb\_concurrency\_tickets](https://mariadb.com/docs/server/server-usage/storage-engines/innodb/innodb-system-variables#innodb_concurrency_tickets) | | | [innodb\_file\_format](https://mariadb.com/docs/server/server-usage/storage-engines/innodb/innodb-system-variables#innodb_file_format) | | | [innodb\_large\_prefix](https://mariadb.com/docs/server/server-usage/storage-engines/innodb/innodb-system-variables#innodb_large_prefix) | | | [innodb\_lock\_schedule\_algorithm](https://mariadb.com/docs/server/server-usage/storage-engines/innodb/innodb-system-variables#innodb_lock_schedule_algorithm) | | | [innodb\_log\_checksums](https://mariadb.com/docs/server/server-usage/storage-engines/innodb/innodb-system-variables#innodb_log_checksums) | | | [innodb\_log\_compressed\_pages](https://mariadb.com/docs/server/server-usage/storage-engines/innodb/innodb-system-variables#innodb_log_compressed_pages) | | | [innodb\_log\_files\_in\_group](https://mariadb.com/docs/server/server-usage/storage-engines/innodb/innodb-system-variables#innodb_log_files_in_group) | | | [innodb\_log\_optimize\_ddl](https://mariadb.com/docs/server/server-usage/storage-engines/innodb/innodb-system-variables#innodb_log_optimize_ddl) | | | [innodb\_page\_cleaners](https://mariadb.com/docs/server/server-usage/storage-engines/innodb/innodb-system-variables#innodb_page_cleaners) | | | [innodb\_replication\_delay](https://mariadb.com/docs/server/server-usage/storage-engines/innodb/innodb-system-variables#innodb_replication_delay) | | | [innodb\_scrub\_log](https://mariadb.com/docs/server/server-usage/storage-engines/innodb/innodb-system-variables#innodb_scrub_log) | | | [innodb\_scrub\_log\_speed](https://mariadb.com/docs/server/server-usage/storage-engines/innodb/innodb-system-variables#innodb_scrub_log_speed) | | | [innodb\_sync\_array\_size](https://mariadb.com/docs/server/server-usage/storage-engines/innodb/innodb-system-variables#innodb_sync_array_size) | | | [innodb\_thread\_concurrency](https://mariadb.com/docs/server/server-usage/storage-engines/innodb/innodb-system-variables#innodb_thread_concurrency) | | | [innodb\_thread\_sleep\_delay](https://mariadb.com/docs/server/server-usage/storage-engines/innodb/innodb-system-variables#innodb_thread_sleep_delay) | | | [innodb\_undo\_logs](https://mariadb.com/docs/server/server-usage/storage-engines/innodb/innodb-system-variables#innodb_undo_logs) | | #### Deprecated Options The following options have been deprecated. They have not yet been removed, but will be in a future version, and should ideally no longer be used. | Option | Reason | | ------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------- | | [wsrep\_replicate\_myisam](https://app.gitbook.com/s/3VYeeVGUV4AMqrA3zwy7/reference/galera-cluster-system-variables#wsrep_replicate_myisam) | Use [wsrep\_mode](https://app.gitbook.com/s/3VYeeVGUV4AMqrA3zwy7/reference/galera-cluster-system-variables#wsrep_mode) instead. | | [wsrep\_strict\_ddl](https://app.gitbook.com/s/3VYeeVGUV4AMqrA3zwy7/reference/galera-cluster-system-variables#wsrep_strict_ddl) | Use [wsrep\_mode](https://app.gitbook.com/s/3VYeeVGUV4AMqrA3zwy7/reference/galera-cluster-system-variables#wsrep_mode) instead. | ### Major New Features To Consider * See also [System Variables Added in MariaDB 10.6](https://mariadb.com/docs/server/ha-and-performance/optimization-and-tuning/system-variables/system-and-status-variables-added-by-major-release/system-variables-added-in-mariadb-10-6). ### See Also * [Features in MariaDB 10.6](https://app.gitbook.com/s/aEnK0ZXmUbJzqQrTjFyb/community-server/10.6/what-is-mariadb-106) * [Upgrading from MariaDB 10.5 to MariaDB 10.6 with Galera Cluster](https://app.gitbook.com/s/3VYeeVGUV4AMqrA3zwy7/galera-management/upgrading-galera-cluster/upgrading-from-mariadb-10-5-to-mariadb-10-6-with-galera-cluster) * [Upgrading from MariaDB 10.4 to MariaDB 10.5](https://mariadb.com/docs/server/server-management/install-and-upgrade-mariadb/upgrading/mariadb-community-server-upgrade-paths/upgrading-to-unmaintained-mariadb-releases/upgrading-from-mariadb-10-4-to-mariadb-10-5) * [Upgrading from MariaDB 10.3 to MariaDB 10.4](https://mariadb.com/docs/server/server-management/install-and-upgrade-mariadb/upgrading/mariadb-community-server-upgrade-paths/upgrading-to-unmaintained-mariadb-releases/upgrading-from-mariadb-103-to-mariadb-104) * [Upgrading from MariaDB 10.2 to MariaDB 10.3](https://mariadb.com/docs/server/server-management/install-and-upgrade-mariadb/upgrading/mariadb-community-server-upgrade-paths/upgrading-to-unmaintained-mariadb-releases/upgrading-from-mariadb-102-to-mariadb-103) *This page is licensed: CC BY-SA / Gnu FDL* {% @marketo/form formId="4316" %}