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Percona Distribution for MySQL 8.4.5 using Percona XtraDB Cluster has been released

Percona Distribution for MySQL 8.4.5 using Percona XtraDB Cluster has been released on Monday, July 14, 2025.

Try it out using the Installation guide.

Percona XtraDB Cluster is based on Percona Server for MySQL and contains all improvements and bug fixes available in the Percona Server for MySQL 8.4.5-5 (2025-05-29) release notes.

Percona XtraDB Cluster 8.4.5-5

Improves State Snapshot Transfer (SST) failure diagnostics. garbd now uses distinct exit codes to differentiate between donor exit, SST script failure, and garbd-initiated termination, making SST issues easier to identify and debug.

Percona Server for MySQL 8.4.5-5

  • Improves the audit_log_filter_set_user() UDF to accept account names with wildcard characters ('%' and '_') in the host part. For example, you can use ‘usr1@%', ‘usr2%192.168.0.%’, or 'usr3@%.mycorp.com'.

  • Updates the C++ level of the KMPI library to enhance error handling capabilities.

  • Improves optimizer behavior by restoring correct handling of const tables in test_quick_select(). A MySQL Upstream refactor (commit 9a13c1c) removed the QEP_TAB dependency, causing get_quick_record_count() to no longer pass const table information. This could lead to suboptimal range scan boundaries. The applied patch resolves the issue by explicitly passing const_tables to test_quick_select(), ensuring consistent behavior with the pre-refactor logic.

MySQL 8.4.5

Improvements and bug fixes introduced by Oracle for MySQL 8.4.5 and included in Percona Server for MySQL are the following:

  • Fixed a problem where CHECK TABLE sometimes incorrectly reported that spatial indexes were corrupted. (Bug #37286473)

  • Fixed an issue in InnoDB redo log recovery to improve data safety after a crash. (Bug #37061960)

  • Corrected a problem where reading index_id values could lead to incorrect behavior with indexes. (Bug #36993445, Bug #37709706)

  • Fixed a bug related to the lower_case_table_names setting that caused inconsistent behavior with table names on different systems. (Bug #32288105)

  • Fixed a bug where mysqldump did not properly escape certain special characters in its output. (Bug #37540722, Bug #37709163)

  • The fprintf_string() function in mysqldump did not use the correct quote character for escaping strings. (Bug #37607195)

Learn more in Percona Distribution for MySQL 8.4.5 using Percona XtraDB Cluster release notes.