Everything I Ever Learned About JVM Performance Tuning @ Twitter
This is worth keeping in the back of the toolbox. It's not very applicable to the work I'm doing today, but for anyone working with persistent, heavily trafficked JVM services this could be very valuable. I wish I'd know about slab allocation when I was working on Amazon Plogs.
Summarizes about a year worth of experiences and case studies in performance tuning the JVM for various services at Twitter.