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Percona XtraDB Cluster 8.4.7-7 (2026-01-13)

Percona XtraDB Cluster (PXC) supports critical business applications in both cloud and on-premises environments, including public, private, and hybrid setups. 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.

Percona XtraDB Cluster 8.4.7-7 is based on Percona Server for MySQL and includes all improvements and bug fixes available in the Percona Server for MySQL 8.4.7-7 (2025-12-22) release notes.

Release highlights

Percona XtraDB Cluster 8.4.7-7

Announcement – Discontinuation of the Percona PRO Program

Percona has consolidated its build offerings. The Pro builds are no longer required. All features from the Percona Server for MySQL 8.4.x Pro build series and Percona XtraBackup 8.4.x Pro build series have been merged into the main open source Community release.

Starting with Percona XtraDB Cluster 8.4.7-7, the xtrabackup SST method uses the Reduced backup lock time feature. This enhancement minimizes blocking on the Donor node during SST process while the backup is being prepared. The Percona XtraBackup reduced lock feature is enabled by default. To modify this behavior, set the desired lock_ddl value in the [xtrabackup] section of the my.cnf configuration file. For more information about the --lock-ddl option and its available values, refer to the xtrabackup command-line options documentation.

Percona Server for MySQL 8.4.7-7

  • The audit log plugin has been reintroduced in Percona Server for MySQL 8.4. However, it is already marked as deprecated and is planned for removal in a future release. This deprecation is due to the availability of the audit log filter component, which is the recommended replacement. Users should migrate to this component, which provides equivalent functionality with enhanced flexibility, performance, and filtering capabilities, ensuring continued support for auditing and compliance requirements.

MySQL 8.4.7

Improvements and bug fixes provided by Oracle for MySQL 8.4.7 and included in Percona Server for MySQL are the following:

  • Fixed an issue that caused excessive memory chunk usage for very large buffer pools, which could lead to allocation failures. The allocation process now includes validation to ensure sufficient and stable memory allocation. (Bug #37994397)

  • Fixed an issue where assertion failures could occur due to data size and bounds mismatches during DDL file operations. (Bug #37882398)

Find the complete list of bug fixes and changes in the MySQL 8.4.7 release notes.

Improvements

  • PXC-4756: Improved startup behavior during State Snapshot Transfer (SST) when using large InnoDB buffer pools with innodb_numa_interleave enabled could delay post-processing long enough to trigger the 300-second SST timeout. Find more information in Percona XtraBackup SST configuration.

Bug fixes

  • PXC-4292: Fixed an issue where State Snapshot Transfer (SST) cleanup searched identical directories multiple times when InnoDB paths pointed to the same location.

  • PXC-4526: Replication failed and the node became inconsistent when a transaction was committed using a tagged Global Transaction Identifier (GTID).

  • PXC-4682: Fixed an issue where SST/IST progress printed “-nan%” in the MySQL error log; it now correctly displays “0%”.

  • PXC-4709: Fixed an issue where a node could be evicted if CREATE/ALTER USER was executed without the AUTHENTICATION_POLICY_ADMIN privilege.

  • PXC-4714: APT package was missing a dependency on ps unix utility, which is used by wsrep_sst_xtrabackup-v2.

  • PXC-4789: Running an UPDATE on a parent table and a RENAME TABLE on a child table at the same time on different nodes could trigger a BF-BF (brute force–brute force) conflict and cause a node to be evicted from the cluster.

Build & packaging notes

  • Percona XtraDB Cluster 8.4 adds support for Debian 13.

  • Percona XtraDB Cluster 8.4 has ended support for Ubuntu 20.04.