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

Release date	2025-06-16
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:

• GCache encryption and Write-Set cache encryption

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

• Added support for GCache and Write-Set encryption.

• PXC-3574: Added support for the wsrep_mode variable.

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.

Useful links

The Percona XtraDB Cluster GitHub location

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