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 |