Based on MySQL 5.5.42, including all the bug fixes in it, Percona Server 5.5.42-37.1 is now the current stable release in the 5.5 series. All of Percona‘s software is open-source and free, all the details of the release can be found in the 5.5.42-37.1 milestone at Launchpad.
RPMpre-install script assumed that the
PIDfile was always located in the
datadir. If it was not, during installation, wrong assumption could be made if the server was running or not. Bug fixed #1201896.
SHOW GRANTSdisplayed only the privileges granted explicitly to the named account. Other effectively available privileges were not displayed. Fixed by implementing Extended SHOW GRANTS feature. Bug fixed #1354988 (upstream #53645).
InnoDB lock monitor output was printed even if it was not requested. Bug fixed #1418996.
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