It’s finally here! Percona Server Percona Server 5.5.8-20.0 is now available for download. This is a beta release of Percona’s enhancements to the MySQL 5.5.8 server. Here are some highlights:

• Performance and scalability improvements throughout the server and storage engine
• Optimizations for flash storage such as SSD, Virident, and FusionIO
• Optimizations for cloud computing
• The HandlerSocket plugin for NoSQL access
• There’s an Amazon OS repository, as well as Yum and Apt repositories
• Improvements to replication, partitioning, stored procedures
• More diagnostics and tunability
• More pluggability, including pluggable authentication

In addition to building on MySQL 5.5, here are the changes we’ve made from previous Percona Server releases:

New Features

• InnoDB adaptive hash function searches can now …

Percona Server version 5.1.54-12.5 is now available for download. It is now the current stable release version.

Functionality Added or Changed

• Percona Server 5.1.54-12.5 is based on MySQL 5.1.54.
• New Features Added: None
• Other Changes:
  • Added system variable innodb_log_block_size and new value “keep_average” to system variable adaptive_checkpoint in Improved InnoDB I/O Scalability. (Yasufumi Kinoshita)
  • Added new value “ALL_O_DIRECT” to system variable …

Percona Server version 5.1.53-12.4 is now available for download. It is now the current stable release version.

Functionality Added or Changed

•  Percona Server 5.1.53-12.4 is based on MySQL 5.1.53.
•  New Features Added:
  • Precompiled UDFs for Maatkit (FNV and MurmurHash hash functions to provide faster checksums) are now included in distributions. Fixes feature request #689992. (Aleksandr Kuzminsky)
•  Other Changes:
  • innodb_doublewrite_file - It's no longer necessary to recreate your database and InnoDB …

Percona Server version 5.1.53-11.7 is now available for download.

The main purpose of this release is to update the current Percona stable release to the latest version of MySQL 5.1.

Functionality Added or Changed

•  Percona Server 5.1.53-11.7 is now based on MySQL 5.1.53.
•  New Features Added: None
•  Other Changes: None

Bugs Fixed

• Bug #643149 - Slow query log entries were not being done in the usual parsing format. (Alexey Kopytov)
• Bug #677407 - The innodb.innodb_information_schema test could fail sporadically due to flawed logic in the INFORMATION_SCHEMA.INNODB_LOCKS caching mechanism. (Alexey Kopytov)

Release Notes for this and previous releases can be found …

Percona Server version 5.1.52-12.3 is now available for download.

The main purpose of this release is to update the current Percona release candidate to the latest version of MySQL 5.1. The release also includes the HandlerSocket plugin, which provides NoSQL features in Percona Server.

Functionality Added or Changed

• Percona Server 5.1.52-12.3 is now based on MySQL 5.1.52.
• New Features Added:
  • HandlerSocket plugin support has been added to all RPM and Debian packages. This is an experimental feature. (Inada Naoki, DeNA Co., Ltd.)
  • …

Percona XtraBackup 1.5-Beta is now available for download.

This release adds additional functionality to Percona XtraBackup 1.4, the current general availability version of XtraBackup.

This is a beta release.

Functionality Added or Changed

• Support for MySQL 5.5 databases has been implemented. (Yasufumi Kinoshita)
• XtraBackup can now be built from the MySQL 5.1.52, MySQL 5.5.7, or Percona Server 5.1.53-12 code bases (fixes bug #683507). (Alexey Kopytov)
• The program is now distributed as three separate binaries: 
  • xtrabackup - for use with Percona Server with the built-in InnoDB plugin
  • xtrabackup_51 - for use with MySQL 5.0 & 5.1 with built-in InnoDB
  • xtrabackup_55 - for use with MySQL 5.5 (this binary is not provided for the …

Percona Server version 5.1.52-rel11.6 is now available for download.

The main purpose of this release is to update the current Percona stable release to the latest version of MySQL 5.1.

Functionality Added or Changed

•  Percona Server 5.1.52-rel11.6 is now based on MySQL 5.1.52.
•  New Features Added: None
•  Other Changes: None

Bugs Fixed

• Bug #671764 - innochecksum wasn't distributed with RPM and .DEB packages. (Aleksandr Kuzminsky)
• Bug #673426 - Use of some system variables as command-line options caused a crash or undefined behavior. (Oleg Tsarev)
• Bug #673929 - Query cache misses were being …

Percona XtraBackup 1.4 is now available for download.

Version 1.4 fixes problems related to incremental backups. If you do incremental backups, it's strongly recommended that you upgrade to this release.

Functionality Added or Changed

• Incremental backups have changed and now allow the restoration of full backups containing certain rollback transactions that previously caused problems. Please see Preparing the Backups and the --apply-log-only option. (From innobackupex, the --redo-only option should be used). (Yasufumi …

Percona Community,

Percona Server version 5.1.51-rel11.5 is now available for download.

The main purpose of this release is to update the current Percona stable release to the latest version of MySQL 5.1.

Functionality Added or Changed

•  Percona Server 5.1.51-rel11.5 is now based on MySQL 5.1.51.
•  New Features Added: None
•  Other Changes: None

Bugs Fixed

•  Bug #661354 - Fixed a problem compiling query_cache_with comments for 5.1.51-rel11.5. (Oleg Tsarev)
•  Bug #661844 - Fixed a problem with server variables failing test for 5.1.51-rel11.5. (Oleg Tsarev)

The Release Notes for this and previous releases can be found in our …

Dear Community,

Percona Server version 5.1.50-rel12.1 RC is now available for download.

Functionality Added or Changed

• Percona Server 5.1.50-rel12.1 is now based on MySQL 5.1.50.
• New Features Added:
  • innodb_lru_dump_restore - Implemented automatic dumping of the buffer pool at specified intervals.
  • innodb_buffer_pool_shm - Implemented option ''innodb_buffer_pool_shm_checksum''; when enabled, shared memory buffer pool is checksum validated. This change also fixed these bugs: #643724, #649408, and #649393. (Yasufumi Kinoshita)
  • …