RickJWagner writes "20 percent inert ingredients, 80 percent nitro glycerin. That's how I'd describe JBoss AS 5 Performance Tuning from Packt. The first 50 pages are nothing to get excited about. This first chapter and a half describes the author's performance tuning life cycle methodology and introduces us to a handful of open source tools that can assist us in our tuning efforts. The tools section seems especially weak-- there are plenty of screenshots showing the tool's menu screens, something you'd normally pick up in about a minute from the tool's distribution website. Honestly, at this point I was beginning to wonder if this book was going to live up to my expectations. Luckily I pressed on for a few more pages, and hit the rich paydirt that makes up the rest of the book. From that point on, every section yielded valuable tuning advice." Keep reading for the rest of Rick's review.