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Percona Distribution for MySQL 8.0.33 using Percona XtraDB Cluster (2023-08-02)

Percona Distribution for MySQL is the most stable, scalable and secure open-source MySQL distribution, with two download options: one based on Percona Server for MySQL and one based on Percona XtraDB Cluster. Install Percona Distribution for MySQL.

This release is focused on the Percona XtraDB Cluster-based deployment variation. It is based on Percona XtraDB Cluster 8.0.33

Release highlights

The HAProxy version is updated from 2.6.12 to 2.8.1. The changes introduced by HAProxy 2.7.0 are the following:

  • The bind-process directive is removed.

  • The process argument on a bind line is removed.

HAProxy 2.8 introduces two new preprocessor functions:

  • The strstr function returns true when a given string is found within another string.

  • The enabled function returns true when the passed in option is enabled at runtime. You can check the following options: POLL, EPOLL, KQUEUE, EVPORTS, SPLICE, GETADDRINFO, REUSEPORT, FAST-FORWARD, and SERVER-SSL-VERIFY-NONE.

Find the full list of changes in the HAProxy 2.8.1 release notes, Announcing HAProxy 2.7 blog post, and in the Announcing HAProxy 2.8 blog post.

Improvements and bug fixes introduced by Oracle for MySQL 8.0.33 and included in Percona XtraDB Cluster and Percona Distribution for MySQL are the following:

  • The INSTALL COMPONENT includes the SET clause. The SET clause sets the values of component system variables when installing one or several components. This reduces the inconvenience and limitations associated with assigning variable values in other ways.

  • The mysqlbinlog --start-position accepts values up to 18446744073709551615. If the --read-from-remote-server or --read-from-remote-source option is used, the maximum is 4294967295. (Bug #77818, Bug #21498994)

  • Using a generated column with DEFAULT(col_name) to specify the default value for a named column is not allowed and throws an error message. (Bug #34463652, Bug #34369580)

  • Not all possible error states were reported during the binary log recovery process. (Bug #33658850)

  • User-defined collations are deprecated. The usage of the following user-defined collations causes a warning that is written to the log:

  • When COLLATE is followed by the name of a user-defined collation in an SQL statement.

  • When the name of a user-defined collation is used as the value of collation_server, collation_database, or collation_connection.

The support for user-defined collations will be removed in a future releases of MySQL.

Find the full list of bug fixes and changes in the MySQL 8.0.33 Release Notes.

Supplied components

Review each component’s release notes for What’s new, improvements, or bug fixes. The following is a list of the components supplied with the Percona XtraDB Cluster-based variation of the Percona Distribution for MySQL:

Component Version Description
Percona XtraBackup 8.0.33-28 An open-source hot backup utility for MySQL-based servers that doesn’t lock your database during the backup.
HAProxy 2.8.1 A high-availability and load-balancing solution for Percona XtraDB Cluster. This is a default proxy.
ProxySQL 2.5.4 A high performance, high-availability, protocol-aware proxy for MySQL.
Percona Toolkit 3.5.4 The set of scripts to simplify and optimize database operation. 1.0 A tool to manage multi-source replication between multiple Percona XtraDB Cluster clusters.

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