Percona Server 5.5.11-20.2 is now available for download, including an experimental build for MacOS. Released on April 28, 2011, it is the current stable release in the the 5.5 series.
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)
was removed because the equivalent, ‘innodb_rollback_segments’, has been implemented in MySQL 5.5. (Yasufumi Kinoshita)
– Using ALTER TABLE to convert an InnoDB table to a MEMORY table could fail due to a bug in innodb_expand_fast_index_creation.patch. (Alexey Kopytov)
– 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)
– A crash was occurring in some cases when innodb_lazy_drop_table was enabled with very large buffer pools. (Yasufumi Kinoshita)
– SYS_STATS internal table of XtraDB has been expanded for supporting ‘innodb_stats_method’ from InnoDB-plugin. (Yasufumi Kinoshita)
Please report any bugs found at Bugs in Percona Server.
For more information, please see the following links: