eG Monitoring
 

Measures reported by CouchDBShrCachtest

Shared cache can be accessed by multiple cores. Since it is shared, each block in the cache is unique and therefore has a larger hit rate as there will be no duplicate blocks. However, data-access latency can increase as multiple cores try to access the same cache.

This test reports the rate of hits on the shared cache, the rate of shared cache that were missed and were totally evicted. By keeping an eye on these metrics over time, administrators can proactively detect a consistent drop in cache hits, investigate the reasons for the same, and promptly initiate measures to improve cache usage and safeguard the server performance.

Outputs of the test : One set of results for the target Apache CouchDB Server.

The measures made by this test are as follows:

Measurement Description Measurement Unit Interpretation
shared_Cache_Hit_Rate Indicates the rate of cache hits occurred on shared cache. Hits/second  
shared_Cache_Miss_Rate Indicates the rate of miss hits occurred on shared cache. Misses/second A high value for this measure indicates that shared cache needs to be allocated with additional resources.
shared_Cache_Evict_Rate Indicates the rate of evictions occurred on shared cache. Events/second