Correct spelling for the English word "AWR" is [ˈa͡ʊ͡ə], [ˈaʊə], [ˈaʊə] (IPA phonetic alphabet).
AWR is an abbreviation that stands for "Automatic Workload Repository." It refers to a built-in Oracle database feature used for system performance monitoring and analysis. AWR collects and maintains performance statistics of a database instance to aid in system diagnosis and tuning.
The Automatic Workload Repository is responsible for gathering a wide range of vital statistics, such as resource usage, wait events, service times, and active sessions. These statistics are captured periodically and stored in the database for later retrieval and analysis. AWR provides a comprehensive view of database performance over time, allowing database administrators to identify bottlenecks, understand system behavior, and make informed decisions to enhance performance.
The AWR data is stored in the database's system tablespace, and it primarily consists of snapshots, which are periodically captured snapshots of the system's statistics. These snapshots are then used to generate detailed reports and recommendations using Oracle's Automatic Database Diagnostic Monitor (ADDM). DBAs can evaluate trends, anomalies, and potential performance issues from these reports to proactively manage and optimize the database system.
Overall, AWR is a powerful tool used in Oracle database management to track and analyze performance metrics over time, assisting administrators in identifying and resolving performance-related problems effectively.