The Package Cache Overflows alarm becomes active when package cache inserts have resulted in overflows. An overflow occurs when the limit set by the PCKCACHESZ database configuration parameter is exceeded. The package cache is forced to borrow memory from other entities in database shared memory, causing possible lock list escalation, loss of concurrency, out of memory errors, and overall performance degradation.
This alarm has been predefined with a severity level of 4 (low alarm). The underlying metric for this alarm can be adjusted to suit your environment by using the Metric Editor.
Determine whether or not you need to increase the size of the package cache to avoid overflows. Clicking on the Package Cache element opens the Databases drilldown where you can review statistics for the package cache.