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Percona XtraDB Cluster 8.4.5-5 has been released

Percona XtraDB Cluster 8.4.5-5 has been released on Monday, July 14, 2025.

Try it out using the Quickstart guide.

This release is based on Percona Server for MySQL 8.4.5-5.

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 XtraDB Cluster 8.4.5-5 release notes.