Percona 5.1系列的分支5.1.65-14.0发布。2012-09-03.上一个版本是2012-05-25的5.1.63.不想升级到5.5的用户可以使用此版本。
完全改进包括：
Percona is glad to announce the release of Percona Server 5.1.65-14.0 on September 3rd, 2012 (Downloads are available from Percona Server 5.1.65-14.0 downloads and from the Percona Software Repositories).
Based on MySQL 5.1.65, including all the bug fixes in it, Percona Server 5.1.65-14.0 is now the current stable release in the 5.1 series. All of Percona‘s software is open-source and free, all the details of the release can be found in the 5.1.65-14.0 milestone at Launchpad.
Features
Percona Server now supports XtraDB changed page tracking. This feature will be used for implementing faster incremental backups that use this information to avoid full data scans.
New table INNODB_CHANGED_PAGES has been implemented. This table contains a list of modified pages from the modified page bitmap files produced by the log tracking thread.
HandlerSocket has been upgraded to version 1.1.0.
Bug Fixes
Loading LRU dump was preventing shutdown. Bug fixed #712055 (George Ormond Lorch III).
The kill idle transactions feature in XtraDB (if enabled) could sometimes cause the server to crash. Bug Fixed: #871722 (Stewart Smith)
Fixed server assertion error related to buffer pool, only visible in debug builds. Bug fixed #905334 (Laurynas Biveinis).
Querying I_S.GLOBAL_TEMPORARY_TABLES or TEMPORARY_TABLES would crash threads working with temporary tables. Bug fixed #951588 (Laurynas Biveinis).
A crash could leave behind an InnoDB temporary table with temporary indexes resulting in an unbootable server. Bug fixed #999147 (Laurynas Biveinis).
Fixed the upstream MySQL bug #66301. Concurrent INSERT ... ON DUPLICATE KEY UPDATE statements on a table with an AUTO_INCREMENT column could result in spurious duplicate key errors (and, as a result, lost data due to some rows being updated rather than inserted) with the default value of innodb_autoinc_lock_mode=1. Bug fixed #1035225 (Alexey Kopytov)
Since the output file is simply overwritten when dumping the LRU list, we could end up with a partially written dump file in case of a crash, or when making a backup copy of it. Safer approach has been implemented. It now dumps to a temporary file first, and then renames it to the actual dump file. Bug fixed #686392 (George Ormond Lorch III).
Fixed the issue where LRU dump would hold LRU_list_mutex during the entire dump process. Now the mutex is periodically released in order not to block server while the dump is in progress. Bug fixed #686534 (George Ormond Lorch III).
Removed error log warnings that occured after enabling innodb_use_sys_stats_table and before ANALYZE TABLE is run for each table. Bug fixed #890623 (Alexey Kopytov).
A Server acting as a replication slave with the query cache enabled could crash with glibc detected memory corruption. Bug fixed #915814 (George Ormond Lorch III).
If the tablespace has been created with MySQL 5.0 or older, importing that table could crash Percona Server in some cases. Bug fixed #1000221 (Alexey Kopytov).
Error log messages are now more verbose for LRU dump. Bug fixed #713481 (George Ormond Lorch III).
Fixed issue where innodb_blocking_lru_restore did not take an optional bool argument similar to other bool options. Bug fixed #881001 (George Ormond Lorch III).
Removed the unneeded lrusort.py script. The server now does this sorting automatically and has done for some time. Bug fixed #882653 (Stewart Smith).
Server started with skip-innodb crashes on SELECT * FROM INNODB_TABLE_STATS or INNODB_INDEX_STATS. Bug fixed #896439 (Stewart Smith).
Removed the INFORMATION_SCHEMA table INNODB_PATCHES (actually XTRADB_ENHANCEMENTS) as it was out of date and isn’t in 5.5 or later either. Bug fixed #1009997 (Stewart Smith).
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