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Percona Software for MySQL Documentation

Percona Server for MySQL 8.2.0-1 (2024-02-05)

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Percona Server for MySQL 8.2.0-1 includes all the features and bug fixes available in the MySQL 8.2 Community Edition in addition to enterprise-grade features developed by Percona.

Release highlights

This release merges the MySQL 8.2 code base. Within this merge Percona introduces several sagnificant changes:

  • Removes remainders of Percona-specific encryption features (support for custom Percona 5.7 encrypted bilnog format.)

  • Removes the deprecated rocksdb_strict_collation_check and rocksdb_strict_collation_exceptions RocksDB system variables.

Improvements and bug fixes introduced by Oracle for MySQL 8.2 and included in Percona Server for MySQL are the following:

  • The insert operations caused records_in_range to read too many disk blocks.

  • System schema tables with INSTANT ADD columns created before 8.0.29 are incompatible with MySQL versions higher than 8.0.29. Performing DMLs on these tables causes an unexpected server exit.

  • A FTS parser plugin now handles single character tokens correctly.

Known issues

  • PS-9078: An upgrade on Ubuntu 20.04 from the following releases does not restart the MySQL service automatically. You must start the service manually.

    • Percona Server for MySQL 8.0.x to Percona Server for MySQL 8.1

    • Percona Server for MySQL 8.0.x to Percona Server for MySQL 8.2

    • Percona Server for MySQL 8.1 to Percona Server for MySQL 8.2

Deprecation or removal

A future release may remove deprecated variables and options. The usage of these deprecated items may cause a warning. We recommend migrating from deprecated variables and options as soon as possible.

This release deprecates the following variables and options:

  • The binlog_transaction_dependency_tracking server system variable

  • The old and new server system variables

  • The --character-set-client-handshake server variable

  • INFORMATION_SCHEMA.PROCESSLIST

  • The implementation of the SHOW PROCESSLIST command that uses the INFORMATION_SCHEMA.PROCESSLIST table

  • The performance_schema_show_processlist variable

This release removes the following variables and options:

  • The WAIT_UNTIL_SQL_THREAD_AFTER_GTIDS() SQL function. Attempting to invoke this function now causes a syntax error. Use WAIT_FOR_EXECUTED_GTID_SET() instead.

  • The --abort-slave-event-count and --disconnect-slave-event-count server startup options. Attempting to use these options now results in an error.

  • The expire_logs_days server system variable. Attempting to use this variable now results in an error. Use the binlog_expire_logs_seconds variable instead.

Find the full list of bug fixes and changes in the MySQL 8.2 Release Notes.

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Last update: 2024-04-16