The "all you need to know link" for tuning Hibernate

I stumbled across this awesome article today: Revving Up Your Hibernate Engine.
Well worth the read if you are or are planning to use Hibernate in the near future.

To quote the summary of the article:
"This article covers most of the tuning skills you’ll find helpful for your Hibernate application tuning. It allocates more time to tuning topics that are very efficient but poorly documented, such as inheritance mapping, second level cache and enhanced sequence identifier generators.

It also mentions some database insights which are essential for tuning Hibernate.
Some examples also contain practical solutions to problems you may encounter."