Database tuning can be a complex exercise, but it can be facilitated by a systematic approach. This chapter describes a systematic five-step approach to performance tuning. It also presents the most important tools provided by Oracle to help with performance tuning; Statspack is given equal time because tools such as Automatic Workload Repository (AWR) and Automatic Database Diagnostic Monitor (ADDM) require licenses and are not available at most sites. In particular, you learn a powerful method of mining the Statspack and AWR repositories for data on performance trends. This data can be graphed by using tools such as Microsoft Excel.