MySQL衍生版 Percona Server 5.1.60-13.1 發布
Percona 發布了 Percona Server 5.1.60-13.1 ，可從 Percona Server 5.1.60-13.1 downloads 這里下載。
Percona 為 MySQL 數據庫服務器進行了改進，在功能和性能上較 MySQL 有著很顯著的提升。該版本提升了在高負載情況下的 InnoDB 的性能、為 DBA 提供一些非常有用的性能診斷工具；另外有更多的參數和命令來控制服務器行為。
Percona Server 只包含 MySQL 的服務器版，并沒有提供相應對 MySQL 的 Connector 和 GUI 工具進行改進。
Percona Server 使用了一些 google-mysql-tools, Proven Scaling, Open Query 對 MySQL 進行改造。
該版本基于 MySQL 5.1.60, 包含所有的 bug 修復，主要有：
- SHOW SLAVE STATUS could give incorrect output with master-master replication and using SET user variables. This could only occur with a sever having both master-master replication and --log-slave-updates enabled. This is also filed in MySQL bug tracker, but not fixed in upstream MySQL at the time of this Percona Server release. Bug Fixed: #860910 (Alexey Kopytov)
- MyISAM repair-by-sort buffer cannot be more than 4GB even on 64bit architectures. With this bug fix, both the server option --myisam-sort-buffer-size and the |myisamchk| --sort-buffer-size can be set to values over 4GB on 64bit systems. For users with large MyISAM tables, this could be a great improvement in |myisamchk|, CREATE INDEX and ALTER TABLE performance. Bug Fixed: #878404 (Alexey Kopytov)
- The atomic operations used in Response Time Distribution on 32bit systems could (in theory) be optimized incorrectly by the compiler. This has not been observed in the wild and may only be an issue with future compilers. With this bug fixed, we have corrected the inline assembly to always produce correct compiled code even if future compilers implement new optimizations. Bug Fixed:#878022 (Laurynas Biveinis)
- GCC 4.6 has expanded diagnostics and compiler warnings. We have audited and fixed these warnings for Percona Server 5.1, finding that the warnings were benign. Bug Fixed #878164(Laurynas Biveinis)
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