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Percona Server 5.5.11-20.2

Released on April 28, 2011 (Downloads are available here and from the Percona Software Repositories. An experimental build for MacOS is available.)

Percona Server 5.5.11-20.2 is a stable release.

New Features

  • HandlerSocket, a NoSQL plugin for MySQL, has been updated to the latest stable version as April 11th, 2011.
  • InnoDB Fast Index Creation now works with mysqldump, ALTER TABLE and OPTIMIZE TABLE. (Alexey Kopytov)

Variable Changes

Variable innodb_extra_rsegments was removed because the equivalent, innodb_rollback_segments, has been implemented in MySQL 5.5. (Yasufumi Kinoshita)

Bug Fixes

  • Bug #757749 - Using ALTER TABLE to convert an InnoDB table to a MEMORY table could fail due to a bug in the Fast Index Creation patch. (Alexey Kopytov)
  • Bug #764395 - InnoDB crashed with an assertion failure when receiving a signal on pwrite(). The problem was that InnoDB I/O code was not fully conforming to the standard on POSIX systems. Calls to fsync(), pread(), and pwrite() can be interrupted by a signal. In such cases, InnoDB would crash with an assertion failure, rather than just restarting the interrupted call. (Alexey Kopytov)
  • Bug #766236 - A crash was occurring in some cases when innodb_lazy_drop_table was enabled with very large buffer pools. (Yasufumi Kinoshita)
  • Bug #733317 - SYS_STATS internal table of XtraDB has been expanded for supporting innodb_stats_method from InnoDB -plugin. (Yasufumi Kinoshita)

Known Bugs

The version of Percona XtraDB shown in logs is not correct. The actual version is 1.1.6-20.2 (instead of 1.1.6-20.1).

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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