If you use MySQL in any halfway serious way, and have not *yet* downloaded the MySQL Administrator tool, you need to do this asap   (available for both Windows and Linux)

The amount of configuration options made easily available to the admin is tantalising.  Aside from the usual user/privilege handling, the following categories offer many configurable options:

• MyISAM parameter
• InnoDB Parameters
• Performance
• Log files
• Replication
• Networking
• Security
• Advanced

… and a 3 graph health status monitor, similar to the Windows Task Manager.