The Caching tab on the Client Application Analysis drilldown measures the impact of the database’s resource caches (memory areas) on the selected application. This tab graphically depicts memory utilization statistics for package cache, catalog cache, the SQL workarea , and buffer pools for the application.
In general, caches enhance the performance of a database when their respective hit rates are high. Usually the hit rate is the ratio of retrieval requests that were satisfied by data already in the cache to the number of all requests—those satisfied by the cache plus those that required a disk read. (This ratio is expressed as a percentage in the various graphs on this tab.)
If you discover a cache utilization issue for a specific database on the Databases drilldown, use the information on this Caching tab to help determine whether the selected application is contributing to the problem.
Use the following graphs to follow cache performance over consecutive monitoring intervals: