Get Started with Performance Tuning Reactive Database Tuning Resolving Performance Degradation Over Time Using the AWR Compare Periods Reports Summary of the AWR Compare Periods Report Summary of the AWR Compare Periods Report The report summary is at the beginning of the AWR Compare Periods report, and summarizes information about the snapshot sets and loads used in the report. The report summary contains the following sections: Snapshot Sets Host Configuration Comparison Cache Sizes Load Profile Top Timed Events