Chapter 19. SYSTEM PERFORMANCE AND MONITORING

Even if "It's slow!" is not the most dreaded phrase a system administrator will ever hear, it's pretty far up on that list. The user doesn't know why the system is slow and probably can't even quantify or qualify the problem any further than that. It just feels slow. Usually there's no test case, no set of reproducible steps, and nothing particularly wrong. A slowness complaint can cause hours of work as you dig through the system trying to find problems that might or might not even exist. One phrase is more dreadful still, especially after you've invested those hours of work: "It's still slow."