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Percona XtraDB Cluster 8.0.31-23 (2023-03-14)

Release date 2025-03-
Install instructions Install Percona XtraDB Cluster

Percona XtraDB Cluster (PXC) supports critical business applications in your public, private, or hybrid cloud environment. Our free, open source, enterprise-grade solution includes the high availability and security features your business requires to meet your customer expectations and business goals.

Release highlights

Percona XtraDB Cluster is based on Percona Server for MySQL. Find a complete list of improvements and bug fixes in the Percona Server for MySQL 8.0.31-23 (2022-11-21) release notes.

This release adds the following feature in tech preview:

Improvements and bug fixes introduced by Oracle for MySQL 8.0.31 and included in Percona Server for MySQL are the following:

  • MySQL adds support for the SQL standard INTERSECT and EXCEPT table operators.

  • InnoDB supports parallel index builds. This improves index build performance. The sorted index entries are loaded into a B-tree in a multithread. In previous releases, this action was performed by a single thread.

  • The Performance and sys schemas show metrics for the global and session memory limits introduced in MySQL 8.0.28.

    The following columns have been added to the Performance Schema tables:

    Performance Schema tables Columns
    SETUP_INSTRUMENTS FLAGS
    THREADS CONTROLLED_MEMORY, MAX_CONTROLLED_MEMORY, TOTAL_MEMORY, MAX_TOTAL_MEMORY
    EVENTS_STATEMENTS_CURRENT, EVENTS_STATEMENTS_HISTORY, EVENTS_STATEMENTS_HISTORY_LONG MAX_CONTROLLED_MEMORY, MAX_TOTAL_MEMORY
    Statement Summary Tables MAX_CONTROLLED_MEMORY, MAX_TOTAL_MEMORY
    Performance Schema Connection Tables MAX_SESSION_CONTROLLED_MEMORY, MAX_SESSION_TOTAL_MEMORY
    PREPARED_STATEMENTS_INSTANCES MAX_CONTROLLED_MEMORY, MAX_TOTAL_MEMORY

    The following columns have been added to the sys schema STATEMENT_ANALYSIS and X$STATEMENT_ANALYSIS views:

    • MAX_CONTROLLED_MEMORY

    • MAX_TOTAL_MEMORY

    The controlled_by_default flag has been added to the PROPERTIES column of the SETUP_INSTRUMENTS table.

    Now, you can add and remove non-global memory instruments to the set of controlled-memory instruments. To do this, set the value of the FLAGS column of SETUP_INSTRUMENTS.

    SQL> UPDATE PERFORMANCE_SCHEMA.SETUP_INTRUMENTS SET FLAGS="controlled" 
WHERE NAME='memory/sql/NET::buff';

  • The audit_log_flush variable has been deprecated and will be removed in future releases.

Find the full list of bug fixes and changes in the MySQL 8.0.31 Release Notes.

New Features

Improvement

  • The Data at Rest encryption now encrypts Record-Set cache.

Bug fixes

  • PXC-3989: Added support for keyring components.

  • PXC-4077: Injecting an empty transaction caused GTID inconsistencies between nodes.

  • PXC-4120: Enabling wsrep-debug created multiple entries of wsrep_commit_empty() in the Error log.

  • PXC-4126: When stream replication and TOI are active, the CREATE USER statement was not allowed.

  • PXC-4116: A PXC replica node stalled with parallel asynchronous parallel replication.

  • PXC-4148: A fix for the MDL conflict db= ticket=10 solved by abort error.

The Percona XtraDB Cluster GitHub location

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Last update: 2024-04-09