What are the least elevated values of statistics_level and C0NTR0LJ4ANAGEMENT_PACK_ACCESS that allow the usage of Monitoring of Database Operations?

The Monitoring of Database Operations feature is part of the Oracle Diagnostics Pack. The use of this pack's features is controlled by the CONTROLMANAGEMENTPACKACCESS parameter, which must be set to either DIAGNOSTIC or DIAGNOSTIC+TUNING. The least elevated of these is DIAGNOSTIC. Additionally, the underlying data collection for monitoring is governed by the STATISTICSLEVEL parameter, which must be set to TYPICAL or ALL. The least elevated of these is TYPICAL. Therefore, the minimum required settings are STATISTICSLEVEL=TYPICAL and CONTROLMANAGEMENTPACKACCESS=DIAGNOSTIC.

A. STATISTICSLEVEL=ALL and CONTROLMANAGEMENTPACKACCESS=DIAGNOSTIC+TUNING will enable the feature, but they are not the least elevated values as requested by the question.
B. STATISTICSLEVEL=BASIC disables many automatic statistics collection features, including the ones required for real-time SQL monitoring.
C. CONTROLMANAGEMENTPACKACCESS=DIAGNOSTIC+TUNING is a valid setting but is more elevated than DIAGNOSTIC, which is sufficient.

1. Oracle Database Licensing Information User Manual, 19c. Chapter 2, "Licensed Functionality". This manual specifies that "Monitoring of Database Operations" is part of the Oracle Diagnostics Pack.

2. Oracle Database Reference, 19c. "CONTROLMANAGEMENTPACKACCESS". The documentation states that DIAGNOSTIC enables the Diagnostics Pack.

3. Oracle Database Reference, 19c. "STATISTICSLEVEL". The documentation explains that TYPICAL is the default and recommended value for enabling the automatic collection of most key statistics.