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Upgrading from MariaDB 10.4 to MariaDB 10.5

There are currently no MariaDB 10.5 releases available, and, as a development version, details on this change may change frequently.

How to Upgrade

For MariaDB Galera Cluster, see Upgrading from MariaDB 10.4 to MariaDB 10.5 with Galera Cluster instead.

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 Mariabackup.

The suggested upgrade procedure is:

Modify the repository configuration, so the system's package manager installs MariaDB 10.4. For example,
- On Debian, Ubuntu, and other similar Linux distributions, see Updating the MariaDB APT repository to a New Major Release for more information.
- On RHEL, CentOS, Fedora, and other similar Linux distributions, see Updating the MariaDB YUM repository to a New Major Release for more information.
- On SLES, OpenSUSE, and other similar Linux distributions, see Updating the MariaDB ZYpp repository to a New Major Release for more information.
Stop MariaDB.
Uninstall the old version of MariaDB.
- On Debian, Ubuntu, and other similar Linux distributions, execute the following:
  sudo apt-get remove mariadb-server
- On RHEL, CentOS, Fedora, and other similar Linux distributions, execute the following:
  sudo yum remove MariaDB-server
- On SLES, OpenSUSE, and other similar Linux distributions, execute the following:
  sudo zypper remove MariaDB-server
Install the new version of MariaDB.
- On Debian, Ubuntu, and other similar Linux distributions, see Installing MariaDB Packages with APT for more information.
- On RHEL, CentOS, Fedora, and other similar Linux distributions, see Installing MariaDB Packages with YUM for more information.
- On SLES, OpenSUSE, and other similar Linux distributions, see Installing MariaDB Packages with ZYpp for more information.
Make any desired changes to configuration options in option files, such as my.cnf. This includes removing any options that are no longer supported.
Start MariaDB.
Run mysql_upgrade.
- mysql_upgrade does two things:
  1. Ensures that the system tables in the mysql database are fully compatible with the new version.
  2. Does a very quick check of all tables and marks them as compatible with the new version of MariaDB .

Incompatible Changes Between 10.4 and 10.5

On most servers upgrading from 10.4 should be painless. However, there are some things that have changed which could affect an upgrade:

Options That Have Changed Default Values

Option	Old default value	New default value
innodb_checksum_algorithm	crc32	full_crc32

Options That Have Been Removed or Renamed

The following options should be removed or renamed if you use them in your option files:

Option	Reason
innodb_checksums	Deprecated and functionality replaced by innodb_checksum_algorithms in MariaDB 10.0.
innodb_locks_unsafe_for_binlog	Deprecated in MariaDB 10.0. Use READ COMMITTED transaction isolation level instead.
innodb_stats_sample_pages	Deprecated in MariaDB 10.0. Use innodb_stats_transient_sample_pages instead.
innodb_rollback_segments	Deprecated and replaced by innodb_undo_logs in MariaDB 10.0.
max_long_data_size	Deprecated and replaced by max_allowed_packet in MariaDB 5.5.

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
innodb_undo_logs

Major New Features To Consider

You might consider using the following major new features in MariaDB 10.5: