Based on MySQL 5.6.16, including all the bug fixes in it, Percona Server 5.6.16-64.0 is the current GA release in the Percona Server 5.6 series. All of Percona’s software is open-source and free, all the details of the release can be found in the 5.6.16-64.0 milestone at Launchpad.
- Percona Server has implemented Backup Locks that can be used as a lightweight alternative to
FLUSH TABLES WITH READ LOCKfor taking physical and logical backups.
- Percona Server has split a new LRU manager thread out of the InnoDB cleaner thread, that performs
LRUflushes and evictions to refill the free lists.
- Percona Server now has server-side support for TokuDB Compression option syntax.
- Percona Server has implemented Slow Query Log Rotation and Expiration feature to provide users with better control of slow query log disk space usage.
- Ability to change database for mysqlbinlog has been ported from Percona Server 5.1.
- In order to comply with Linux distribution packaging standards Percona‘s version of
libmysqlclienthas been renamed to
libperconaserver. The old name was conflicting with the upstream
libmysqlclient. Except for packaging,
libperconaserverclientof the same version do not have any differences. Users wishing to continue using
libmysqlclientwill have to install the corresponding package of their distribution, such as
mysql-libfor CentOS and
libmysqlclient18for Ubuntu/Debian. Users wishing to build software against
libperconaserverclient-devpackage. An old version of Percona-built
libmysqlclientwill be available for download.
- The XtraDB version number in
univ.iwas incorrect. Bug fixed #1277383.
- Percona Toolkit UDFs were only shipped with RPM packages. Bug fixed #1159625.
- A debug server build will crash if, while performing a bulk insert to a partitioned table, one of the partitions will return a failure for
end_bulk_inserthandler call. Bug fixed #1204871 (upstream #71270).
- Percona Server 5.6 installation on Debian would fail due to default config reference to
/etc/mysql/conf.dwhich didn’t exist. Bug fixed #1206648.
- Due to a regression in the buffer pool mutex split, a combination of InnoDB compression, write workload, and multiple active purge threads could lead to a server crash. Bug fixed #1247021.
- Server would crash on startup when XA support functions were activated by a second storage engine. Fix for this bug was ported from MariaDB. Bug fixed #1255549 (upstream #47134).
FLUSH STATUScould cause a server crash on the next transaction commit if two XA-supporting storage engines are in use. Fix for this bug was ported from MariaDB. Bugs fixed #1255551 (upstream #70854).
auth_pam.soshared library needed for PAM Authentication Plugin was missing from
RPMpackages. Bug fixed #1268246.
- Fix for bug #1227581, a buffer pool mutex split regression, was not complete, thus a combination of write workload to InnoDB compressed table and a tablespace drop could crash the server. Bug fixed #1269352.
RPMpackages couldn’t be built from source tarballs on Fedora 19. Bug fixed #1229598.
- Percona Server compilation with Performance Schema turned off would fail due to regression introduced by the 5.6 priority mutex framework. Bug fixed #1272747.
- The InnoDB page cleaner thread could have incorrectly decided whether the server is busy or idle on some of its iterations and consequently issue a too big flush list flushing request on a busy server, causing performance instabilities. Bug fixed #1238039 (upstream #71988).
- Percona Server had different server version value when installing from Source and from Binary/RPM. Bug fixed #1244178.
- InnoDB did not handle the cases of asynchronous and synchronous I/O requests completing partially or being interrupted. Bugs fixed #1262500 (upstream #54430), and #1263087 (Andrew Gaul).
- The fix for upstream bug #70768 may cause a high rate of RW lock creations and destructions, resulting in a performance regression on some workloads. Bug fixed #1279671 (upstream #71708).
- Debian and Ubuntu packaging has been reworked to meet the packaging standards. Bug fixed #1281261.
- Fixed the CMake warnings that were happening when
Makefilewas generated. Bugs fixed #1274827, upstream bug fixed #71089 and #1274411 (upstream #71094).
- On Ubuntu Precise multiple architecture versions of
libmysqlclient18couldn’t be installed side by side. Bug fixed #1052636.
- Percona Server source tree has been reorganized to match the MySQL source tree layout closer. Bug fixed #1014477.
- Performance Schema autosizing heuristics have been updated to account for Percona Server-specific
wait/synch/mutex/sql/THD::LOCK_temporary_tablesmutex. Bug fixed #1264952.
[UPDATE 2014-03-12]: Changes that were made for Ubuntu/Debian packages may cause the warnings during the upgrade (in some cases package manager might warn you that you are doing a downgrade). It is safe to ignore the warning. You won’t have that warning in next versions. If you’re experiencing any issues during the upgrade/install process please report a bug. These changes have been done in order to improve our packaging quality.