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Percona Server 5.5.31-30.3

Percona is glad to announce the release of Percona Server 5.5.31-30.3 on May 24th, 2013. Downloads are available here and from the Percona Software Repositories.

Based on MySQL 5.5.31, including all the bug fixes in it, Percona Server 5.5.31-30.3 is now the current stable release in the 5.5 series. All of Percona‘s software is open-source and free, all the details of the release can be found in the 5.5.31-30.3 milestone at Launchpad.

New Features

Percona Server has ported the Atomic write support for Fusion-io devices patch from MariaDB. This feature adds atomic write support for directFS filesystem on Fusion-io devices. This feature implementation is considered BETA quality.

Percona Server has introduced innodb_read_views_memory and innodb_descriptors_memory status variables in the Extended Show Engine InnoDB Status to improve InnoDB memory usage diagnostics.

Bug Fixes

Fix for bug #1131187 introduced a regression that could cause a memory leak if query cache was used together with InnoDB. Bug fixed #1170103.

Fixed RPM packaging regression that was introduced with the fix for bug #710799. This regression caused mysql schema to be missing after the clean RPM installation. Bug fixed #1174426.

Fixed the Percona-Server-shared-55 and Percona-XtraDB-Cluster-shared RPM package dependences. Bug fixed #1050654.

Fixed the upstream bug #68999 which caused compiling Percona Server to fail on CentOS 5 and Debian squeeze due to older OpenSSL version. Bug fixed #1183610.

If a slave was running with its binary log enabled and then restarted with the binary log disabled, Crash-Resistant Replication could overwrite the relay log info log with an incorrect position. Bug fixed #1092593.

Fixed the CVE-2012-5615 vulnerability. This vulnerability would allow remote attacker to detect what user accounts exist on the server. This bug fix comes originally from MariaDB (see MDEV-3909). Bug fixed #1171941.

Fixed the CVE-2012-5627 vulnerability, where an unprivileged MySQL account owner could perform brute-force password guessing attack on other accounts efficiently. This bug fix comes originally from MariaDB (see MDEV-3915). Bug fixed #1172090.

mysql_set_permission was failing on Debian due to missing libdbd-mysql-perl package. Fixed by adding the package dependency. Bug fixed #1003776.

Rebuilding Debian source package would fail because dpatch and automake were missing from build-dep. Bug fixed #1023575 (Stephan Adig).

Backported the fix for the upstream bug #65077 from the MySQL 5.6 version, which removed MyISAM internal temporary table mutex contention. Bug fixed #1179978.

This documentation is developed in Launchpad as part of the Percona Server 5.5.
If you spotted inaccuracies, errors, don't understand it or you think something is missing or should be improved, please file a bug.
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