InnoDb variables

Sure, there are tools and script to help you fine tune your MySQL server but there’s nothing like using your brain.

Pythian has done a wonderful job of explaining what all those InnoDb-related variables in a series of articles…

Exposing Innodb Internals via System Variables: Part 1, Memory
Exposing Innodb Internals via System Variables: Part 2, I/O (structure and logs)
Exposing Innodb Internals via System Variables: Part 3, I/O (Table data)
Exposing Innodb Internals via System Variables: Part 4, Concurrency
Exposing Innodb Internals via System Variables: Part 5, Consistency / Statistics handling