Percona Server 5.1.55-12.6 发布了，该版本是对应 MySQL 5.1.55 GA 版本，主要改进包括：
Changes
Fixed compiler warnings in both the core server and in XtraDB. (Alxey Kopytov, Yasufumi Kinoshita)
Bugs Fixed
Bug #602047 – The ROWS_READ columns of TABLE_STATISTICS and INDEX_STATISTICS were not properly updated when a query involved index lookups on an InnoDB table. (Yasufumi Kinoshita)
Bug #707742 – The server could crash when trying to import a table which had not been previously prepared using xtrabackup --prepare --export. Also, on servers with huge buffer pools, adding or removing an index even on an empty InnoDB table could take a long time due to excessive locking when innodb_dict_size_limit was non-zero. Locking was relaxed to alleviate this. (Yasufumi Kinoshita)
Bug #724674 – Ported an updated version of the original implementation of the Excessive Function Calls, which removes some fcntl calls to improve performance. (Oleg Tsarev)
Percona Server 5.1.55-12.6 发布
Percona Server 5.1.55-12.6 发布了，该版本是对应 MySQL 5.1.55 GA 版本，主要改进包括：
Changes
Bugs Fixed
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