Percona announces the release of Percona Server for MySQL 5.5.53-38.4 on November 23, 2016. Based on MySQL 5.5.53, including all the bug fixes in it, Percona Server for MySQL 5.5.53-38.5 is now the current stable release in the 5.5 series.
Metrics for scalability measurement feature is being built by default but deprecated. Users who have installed this plugin but are not using its capability are advised to uninstall the plugin due to known crashing bugs. This feature was accidentally removed instead of deprecated in the previous release which could cause issues for users that had this feature enabled.