Extension registry counters

Use this page as a reference for properties of extension registry counters.

Data counters for this category contain usage information for the extension registry.

Counter definitions

Name	Key	ID	Description	Granularity	Type	Level	Overhead
RequestCount	ExtensionRegistryStats.numRequests	1	The total number of cache read requests served	Per server	CountStatistic	Basic	Low
HitCount	ExtensionRegistryStats.numHits	2	The number of cache hits out of the total requests	Per server	CountStatistic	Basic	Low
HitRate	ExtensionRegistryStats.hitRate	3	The rate for cache hits	Per server	TimeStatistic	Basic	Low
DisplacementCount	ExtensionRegistryStats.numDisplaces	4	The number of cache displacements	Per server	CountStatistic	Basic	Low

Monitor overall system health

PMI data organization