MySQL is known for its speed. A number of factors out of MySQL’s control, however, can impact application and database performance. Application architects control some of these factors, but database administrators control others. In this chapter, we will introduce you to some of the principles of performance tuning and discuss some of the tools you have at your disposal.

The key to good database performance is solid application and database design. Performance tuning cannot make up for poor design because it is too late in the application development process. Chapter 7 covers the elements of good database design. This chapter handles those things you can do after an application is deployed to help the system run its fastest.