This is the most complete book available on performance optimization - featuring coverage of UNIX, networking (TCP/IP), hardware architecture, and program optimization - all in one volume. Covers performance basics; understanding UNIX; BSD instrumentation; System V instrumentation; system tuning; optimizing user programs written in high- level languages; and making accurate measurements. Explains in detail the output from each command - along with "real-life" rules of thumb on what value is "good" and what is not.