Database Autonomy Service (DAS) provides the performance insight feature (original version). The original version provides charts and tables to help you evaluate database workloads and identify the root causes of database performance issues. This improves the stability of your databases.

Data sources

The original version of performance insight collects and analyzes data from the following major sources:
  • If the Performance Schema feature is enabled for database instances, the original version of performance insight collects and analyzes data stored in the Performance Schema feature.
  • If the Performance Schema feature is disabled for database instances, the performance Insight feature collects and analyzes the data of active sessions.


  1. Log on to the DAS console.
  2. In the left-side navigation pane, click Instance Monitoring.
  3. On the page that appears, click the ID of the database instance that you want to manage. The instance details page appears.
  4. In the left-side navigation pane, click Performance Insight.
  5. On the Performance Insight tab, click Enable Performance Insight. In the message that appears, click OK to enable the performance insight feature.
    Note If you no longer use the performance insight feature, you can click Disable Performance Insight on the Performance Insight tab to disable this feature.
  6. In the Performance Insight and Average Active Session sections, you can view the following information about the database instance.
    Note When you select a time range, the end time must be later than the start time.
    • Data generated in up to seven days within the last month are displayed in the Performance Insight section.
    • The information about sessions in the last three days are displayed in the Average Active Session section.
    • In the Performance Insight section, you can specify a time range to view the database performance metrics within the specified period.

      You can view details of a specific performance metric. For example, if you want to view the memory usage or CPU utilization of the database instance, click Details on the right side of Memory Usage/CPU Utilization.

    • In the Average Active Session section, you can view the trends of different types of sessions and the database workloads from multiple dimensions. This can help you identify the root causes of performance issues.

      Click Optimize in the Actions column corresponding to an SQL query. On the SQL Diagnosis Optimization page, view the corresponding SQL statement, execution plan, and diagnosis result.