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Percona Server 5.5.8-20.0

Released on February 16, 2011 (Downloads are available here and from the Percona Software Repositories.)

Percona Server 5.5.8-20.0 is a beta release.

New Features

  • InnoDB adaptive hash function searches can now be spread across multiple partitions (see Multiple Adaptive Hash Search Partitions). Bug fixed: #688866. (Yasufumi Kinoshita)
  • Information from SHOW ENGINE INNODB STATUS was made available in new status variables in InnoDB Show Status. Bug fixed: #698797.

Variable Changes

  • New variable innodb_adaptive_flushing_method was added.
  • New variable innodb_use_global_flush_log_at_trx_commit was added. Bug fixed: #635399. (Yasufumi Kinoshita)
  • New variable log_warnings_silence replaced old variable suppress_log_warning_1592. Bug fixed: #692413. (Oleg Tsarev)
  • Old variable innodb_adaptive_checkpoint was deleted. Bug fixed: #689450. (Yasufumi Kinoshita)
  • Old variable innodb_flush_log_at_trx_commit_session was deleted. Bug fixed: #635399. (Yasufumi Kinoshita)
  • Old variable use_global_long_query_time was deleted. Bug fixed: #692415. (Oleg Tsarev)
  • Old variable innodb_ibuf_accel_rate was renamed to innodb_ibuf_merge_rate. Bug fixed: #695906 (Yasufumi Kinoshita)
  • Old variable enable_query_response_time_stats was renamed to query_response_time_stats. (Oleg Tsarev)
  • Existing variable log_slow_verbosity had two new values added: profiling and profiling_use_getrusage. (Oleg Tsarev)
  • Existing variables profiling_server and profiling_use_getrusage were merged into the Slow Query Log page. (Oleg Tsarev)

Other Changes

  • Additional information was added to the LOG section of the SHOW STATUS command. Bug fixed: #693269. (Yasufumi Kinoshita)
  • The SHOW PATCHES command was removed. (Vadim Tkachenko)
  • The INFORMATION_SCHEMA table XTRADB_ENHANCEMENTS was removed. (Yasufumi Kinoshita)
  • Several fields in the INFORMATION_SCHEMA table INNODB_INDEX_STATS were renamed. Bug fixed: #691777. (Yasufumi Kinoshita)
  • The XtraDB version was set to 20.0. (Aleksandr Kuzminsky)
  • Many InnoDB compilation warnings were fixed. Bug fixed: #695273. (Yasufumi Kinoshita)
  • An Amazon OS repository was created. Bug fixed: #691996. (Aleksandr Kuzminsky)
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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