"High-Performance Tuning with Statspack" establishes a baseline understanding of tuning and addresses each topic in an easy to understand manor, with illustrated examples of how to implement the concept. There are commands and tools to identify network and system performance slow downs, like top, iostats and vmstat. Each is documented how to use and what the output really means. Examples throughout the book include the commands for different hardware, like Solaris, HP and AIX. The one thing I found most useful was the methodical way to identify a performance issue as a network, system, rdbms or sql code issue. This book is filled with tips and tricks, sql code, and other useful commands that help you get to the heart of the your tuning issues.