Which chart types are included in Oracle database metrics accessible through Dynatrace?

PGA memory charts are specifically designed to monitor the Program Global Area (PGA) in an Oracle database. The PGA is a memory region that contains data and control information for a server session. Monitoring PGA memory usage is crucial for performance tuning and to ensure sufficient resources are available for database processes. Dynatrace provides detailed visualization of this memory consumption, allowing database administrators and performance analysts to identify potential memory bottlenecks or excessive usage that could impact database performance.

In contrast, the other options listed do not directly relate to metrics typically associated with Oracle database performance within Dynatrace. Logs and error charts, while useful for troubleshooting, focus more on application behavior and issues rather than the database's memory usage. User activity charts typically track interactions or transaction metrics at the application level without drilled-down visibility into the database's memory specifics. Lastly, system load charts provide an overview of resource utilization but may not capture the detailed memory state of the Oracle database, which is specifically represented by PGA memory charts. Thus, PGA memory charts are the most relevant and necessary for monitoring Oracle database metrics within the context provided.