Percona Server 5.5.42-37.1 发布，此版本是基于 MySQL 5.5.42 版本，包括其所有 bug 修复，是 5.5. 系列最新的稳定版本。 此版本现已提供在这里和 Percona Software Repositories，详情请看 5.5.42-37.1 milestone。
Bugs 修复
RPM pre-install script assumed that the PID file 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 GRANTS displayed 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. The stored procedure key was made consistent with other keys in the Slow Query Log by replacing space with an underscore. Bug fixed #1419230.
其他 bug 修复：#1408232, #1415843 (upstream #75642), bug fixed #1407941, and bug fixed#1424568 (upstream #75868). 同时发布的还有 Percona Server 5.6.23-72.1 发行说明请看在线文档。
Percona 为 MySQL 数据库服务器进行了改进，在功能和性能上较 MySQL 有着很显著的提升。该版本提升了在高负载情况下的 InnoDB 的性能、为 DBA 提供一些非常有用的性能诊断工具；另外有更多的参数和命令来控制服务器行为。 Percona Server 只包含 MySQL 的服务器版，并没有提供相应对 MySQL 的 Connector 和 GUI 工具进行改进。 Percona Server 使用了一些 google-mysql-tools, Proven Scaling, Open Query 对 MySQL 进行改造。 | 
