Percona Server全面更新。5.6.15-63.0/5.5.35-33.0/5.1.73-14.11 发布 .2013-12-20. 同步基于 MySQL 5.6.15/5.5.34/5.1.73.此版本增强了线程池在高并发下的性能，增强mysqlbinlog支持SSL和压缩支持，降低了信息模式里用户 统计的性能开销及一些 Bug 修正。
Percona Server has extended mysqlbinlog to provideSSLand compression support.
Percona Server has reduced the performance overhead of the User Statistics feature.
Certain types of workloads (large result sets, blobs, slow clients) can have longer waits on network I/O (socket reads and writes). Whenever server waits, this should be communicated to the Thread Pool, so it can start new query by either waking a waiting thread or sometimes creating a new one. Ported MariaDB patch MDEV-156, bug fixed #1159743.
mysqldump --innodb-optimize-keyswas generating incorrectCREATE TABLEstatements for partitioned tables. Bug fixed #1233841.
Fixed errors when server was compiled with-DWITH_LIBWRAP=ONoption. Bug fixed #1240442.
Ifinnobase_atomic_writeswas used on separate undo files that do not exists would lead to operating system error. Bug fixed #1255638 (Jan Lindström).
Default value for thread_pool_max_threads has been changed from500to100 000(the maximum supported number of connections), because limiting the total number of threads in the Thread Pool can result in deadlocks and uneven distribution of worker threads between thread groups in case of stalled connections. Bug fixed #1258097.
PURGE CHANGED_PAGE_BITMAPS BEFOREstatement would delete the changed page data after the specified LSN and up to the start of the next bitmap file. If this data were to be used for fast incremental backups, its absence would cause Percona XtraBackup to fall back to the full-scan incremental backup mode. Bug fixed #1260035 (Andrew Gaul).
Server performance could degrade under heavy load or it could deadlock on shutdown while performing purge. Bug fixed #1236696.
Server could crash under heavy load if InnoDB compression was used. Bug fixed #1240371.
Redo log checksum mismatches would be diagnosed using the data page checksum algorithm setting instead of redo log checksum algorithm one. Bug fixed #1250148.