Automatic database diagnostic monitoring is enabled by default and is controlled by the CONTROL_MANAGEMENT_PACK_ACCESS and the STATISTICS_LEVEL initialization parameters.

Set CONTROL_MANAGEMENT_PACK_ACCESS to DIAGNOSTIC+TUNING (default) or DIAGNOSTIC to enable automatic database diagnostic monitoring. Setting CONTROL_MANAGEMENT_PACK_ACCESS to NONE disables many Oracle Database features, including ADDM, and is strongly discouraged.

Set STATISTICS_LEVEL to TYPICAL (default) or ALL to enable automatic database diagnostic monitoring. Setting STATISTICS_LEVEL to BASIC disables many Oracle Database features, including ADDM, and is strongly discouraged.

To determine whether ADDM is enabled:

1. Access the Database Home page.

   See "Accessing the Database Home Page" for more information.

2. From the Administration menu, select Initialization Parameters.

   If the Database Login page appears, then log in as a user with administrator privileges. The Initialization Parameters page appears.

3. In the Name field, enter statistics_level and then click Go.

   The Initialization Parameters table shows the setting of this initialization parameter.

   
   Description of the illustration statistics_level.gif

4. Do one of the following:

   • If the Value list shows ALL or TYPICAL, then do nothing.

   • If the Value list shows BASIC, then select ALL or TYPICAL, and then click Apply.

5. In the Name field, enter control_management_pack_access, and then click Go.

   The table shows the setting of this initialization parameter.

6. Do one of the following:

   • If the Value column shows DIAGNOSTIC or DIAGNOSTIC+TUNING, then do nothing.

   • If the Value column shows NONE, then select DIAGNOSTIC or DIAGNOSTIC+TUNING and click Apply.