Visualize that you are on a vacation, enjoying the trip, and at 2 o'clock in the morning, your phone rings. You quickly pick up your phone to find out that your boss is calling to say that ABC Company's web system is down and you have to come online and fix the issue. If you don't want to face these sort of situations, please read this chapter with more attention.

In this chapter, we will cover the major topics of performance tuning including the following: