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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)
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