An AWR report is a report that displays database performance and activity snapshots. The interpretation steps include: identifying the date and time of the activity snapshot. View an overview of activities and resource consumption. Analyze session activities to find session types, resource consumption, and waiting events. Find potential performance bottlenecks such as slow SQL statements, resource contention, and I/O issues. View waiting events, identify and resolve them for performance. Analyze latch and memory usage patterns to identify memory issues that are causing performance issues.
How to interpret Oracle AWR reports
What is an AWR report?
The AWR (Automatic Workload Repository) report is a snapshot showing the performance and activity of the database over a specific time period. It captures detailed information about database activity, resource consumption, and performance issues.
How to interpret AWR reports?
To interpret an AWR report, follow these steps:
- Identify Activity Snapshots: The beginning of the report identifies the date and time of the activity snapshot on which the report is based.
- View the Overview section: This section provides an overview of database activity and resource consumption, including CPU usage, memory usage, and I/O statistics.
- Analyze session activity: This section displays details of active sessions during reporting, including session type, resource consumption, and waiting events.
- Find performance bottlenecks: AWR reports highlight potential performance bottlenecks, such as slow-running SQL statements, resource contention, and I/O issues.
- View Waiting Events: This section lists the waiting events that occur during the reporting period and the amount of time they consume. Identifying and resolving these waiting events can significantly improve performance.
- Analyze Latches and Memory: These sections provide information about memory usage patterns, latch contention, and page size. This helps identify memory issues that are causing performance issues.
hint:
- Use the filters and sorting features in AWR reports to focus on specific sessions or events.
- In addition to AWR reports, other tools such as ASH and OEM can be used to obtain deeper performance insights.
- If you have questions about interpreting the report, you can consult Oracle documentation or ask database experts for help.
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