words of wisdom from a systems engineer

MySQLTuner v0.8.9 is now available

MySQLTuner v0.8.9 is now available.  There are a few bug fixes, performance improvements, and readability adjustments.

Table enumeration and sizing can now be skipped

I’ve received reports that MySQLTuner will stall while enumerating tables on servers that contain a lot of tables or a lot of large tables.  You can now use the --skipsize option to skip over the table enumeration process and let the script finish.  However, you will not be able to receive some recommendations since the script was unable to determine which storage engines are enabled.

New table enumeration and sizing method for MySQL 5

The script now uses information_schema to enumerate tables and their sizes for MySQL 5 servers.  This has provided a drastic improvement in performance.

Readability improvements

The recommendations for query_cache_limit and max_heap_table_size/tmp_table_size have been improved.

As always, I welcome your suggestions, bug reports, and questions!  Please feel free to drop a comment on this blog posting or send me an e-mail (it’s in the script).  Also, don’t forget to sign up for the MySQLTuner version announcement list.