Recommended Book : High Performance Web Sites
High Performance Web Sites is another book which we've found highly useful here at UKD1.
The book includes good advice from the guys who wrote YSlow for Firebug in the form of fourteen rules.
It's aim is to advise a front end developer how to improve the performance of your site - which in-turn will improve your visitors experience. A faster loading site means happier users.
Most of the rules are pretty simple to implement as well as being well cheap / free cost wise. Highly recommended.
Recommended Book : High Performance MySQL: Optimization, Backups, Replication, and More
I got this book a while back after reading the authors blog - MySQL Performance Blog. The book is well written, full of helpful information and not for complete beginniers - which is a nice change!
It has has good sections on benchmarking, profiling, backups, security, as well as MySQL tools.