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Percona XtraDB Cluster Documentation

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Percona XtraDB Cluster 8.0.28-19.1 (2022-07-19)

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

Improvements and bug fixes introduced by Oracle for MySQL 8.0.28 and included in Percona Server for MySQL are the following:

  • The ASCII shortcut for CHARACTER SET latin1 and UNICODE shortcut for CHARACTER SET ucs2 are deprecated and raise a warning to use CHARACTER SET instead. The shortcuts will be removed in a future version.

  • A stored function and a loadable function with the same name can share the same namespace. Add the schema name when invoking a stored function in the shared namespace. The server generates a warning when function names collide.

  • InnoDB supports ALTER TABLE ... RENAME COLUMN operations when using ALGORITHM=INSTANT.

  • The limit for innodb_open_files now includes temporary tablespace files. The temporary tablespace files were not counted in the innodb_open_files in previous versions.

Find the full list of bug fixes and changes in the MySQL 8.0.28 Release Notes.

Bugs Fixed

  • PXC-3923: When the read_only or super_read_only option was set, the ANALYZE TABLE command removed the node from the cluster.

  • PXC-3388: Percona XtraDB Cluster stuck in a DESYNCED state after joiner was killed.

  • PXC-3609: The binary log status variables were updated when the binary log was disabled. Now the status variables are not registered when the binary log is disabled. (Thanks to Stofa Kenida for reporting this issue.)

  • PXC-3848: The cluster node exited when the CURRENT_USER() function was used. (Thanks to Steffen Böhme for reporting this issue.)

  • PXC-3872: A user without system_user privilege was able to drop system users. (Thanks to user jackc for reporting this issue.)

  • PXC-3918: Galera Arbitrator (garbd) could not connect if the Percona XtraDB Cluster server used encrypted connections. The issue persisted even when the proper certificates were specified.

  • PXC-3924: Using TRUNCATE TABLE X and INSERT INTO X options when the foreign keys were disabled and violated caused the HA_ERR_FOUND_DUPP_KEY error on a slave node. (Thanks to Daniel Bartoníček for reporting this issue.)

  • PXC-3062: The wsrep_incoming_addresses status variable did not contain the garbd IP address.