You can view monitoring template apply history using the predefined report in Information Publisher. From the Enterprise menu, select Reports and then Information Publisher. On the Information Publisher page, you can enter "template" in the Title text entry field and click Go. The predefined report Monitoring Template Apply History (last 7 days) appears in the report list.

By default, Enterprise Manager retains the monitoring template apply history for a period of 31 days. If required, you can change the retention period to a value suitable for your monitoring needs. Although the retention period cannot be indefinite, it can be set to an extremely long period of time. Enterprise Manager provides the following PL/SQL API to change the retention period.

mgmt_template_ui.modify_purge_policy(p_retention_days=><num_days>)

This procedure takes a NUMBER as input (num_days).