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。
Percona Server 5.6.21-70.0 发布，此版本现已提供在 Percona 主页或者是 Percona 软件库。此版本支持 Ubuntu 14.10 和 CentOS7。
此版本是基于 MySQL 5.6.21，包括其所有的 bug 修复，是当前最新的稳定版本。
更新内容如下：
新特性
Percona Server has ported new super-read-only option from WebScaleSQL.
Percona Server has implemented CSV engine mode for standard-compliant quote and comma parsing. This feature also fixes the bug #1316042 (upstream #71091).
Percona Server now supports Read Free Replication for TokuDB storage engine.
TokuDB storage engine package has been updated to version 7.5.2.
Bugs 修复：
Values of IP and DB fields in the Audit Log Plugin were incorrect. Bug fixed #1379023.
Specifying the --malloc-lib during the server start would produce two LD_PRELOAD entries, if a system-wide jemalloc library was installed. Bug fixed #1382069.
In multi-threaded slave replication setup, an incomplete log event group (the one which doesn’t end with COMMIT/ROLLBACK/XID) in a relay log could have caused a replication stall. An incomplete log event group might occur as a result of one of the following events: 1) slave crash; 2) STOP SLAVE or FLUSH LOGS command issued at a specific moment; 3) server shutdown at a specific moment. Bug fixed #1331586 (upstream #73066).
Purging bitmaps exactly up to the last tracked LSN would abort XtraDB changed page tracking. Bug fixed #1382336.
mysql_install_db script would silently ignore any mysqld startup failures. Bug fixed #1382782 (upstream #74440).
其他 bug 修复： #1369950, #1335590, #1067103, and #1282599.
更多更新内容请看 online documentation。
软件详情：http://www.percona.com/doc/percona-server/5.6/release-notes/Percona-Server-5.6.21-70.0.html
下载地址：http://www.percona.com/downloads/Percona-Server-5.6/Percona-Server-5.6.21-70.0/
来自:开源中国社区
