Which procedure can be used to modify the Automatic Workload Repository retention setting?

The correct procedure for modifying the Automatic Workload Repository (AWR) retention setting is indeed the one that is specifically designed for that purpose: DBMS_WORKLOAD_REPOSITORY.MODIFY_SNAPSHOT_SETTINGS. This procedure allows users to adjust settings related to the retention of snapshots, including how long they are stored in the AWR.

The AWR plays a vital role in Oracle databases by collecting, processing, and maintaining performance statistics. Managing retention settings is crucial for optimizing database performance analysis, as it defines how long the collected data is kept for review and diagnostics. By using this particular procedure, database administrators can ensure that they retain the necessary performance data without overly consuming resources with too much historical data.

The other procedures mentioned do not have the specific functionality required for modifying the AWR retention settings. For instance, DBMS_SCHEDULER.SET_RETENTION_TIME pertains to job scheduling and not to performance data retention. Similarly, DBMS_WORKLOAD.RESET_RETENTION_SETTINGS is not an actual procedure known in the context of AWR management, and DBMS_AUTO_WORKLOAD.MODIFY_SETTINGS does not correctly reflect the naming convention used for snapshot settings in the context of AWR. Therefore, the focus on the correct procedure ensures that the retention settings are effectively