eG Monitoring
 

Measures reported by SolrCoreCachTest

Solr features a Web interface that makes it easy for Solr administrators and programmers to view Solr configuration details, run queries and analyze document fields in order to fine-tune a Solr configuration and access online documentation and other help.

Using this test, administrators can effectively keep an eye on working on admin console and can handle if there are any errors in timely manner. This test reports the errors encountered which relates to admin console.

Outputs of the test: One set of results for each cache on each of the Solr core in Apache Solr setup.

The measures made by this test are as follows:

Measurement Description Measurement Unit Interpretation
evictions Indicates the number of cache evictions for current index searcher. Number If the number is going up over the measurements may be an indicator poor cache performance.
ramMemoryUsed Indicates the actual heap usage of the cache during the last measurement period. MB A large size of Cache may not be the ideal as it could accumulate a lot of garbage. This measure along with other metrics can provide better insights for cache tuning.
hits Indicates the number of cache hits for the current index searcher during the last measurement. Number A high number of hits is always preferred, if the number is going down over a series of measurements, you could investigate it further.
inserts Indicates the number of inserts in the cache during the last measurement period. Number A high number of cache inserts could bring down the performance for the time being but eventually the performance will come up and there will be higher number of cache hits.
lookups Indicates the number of lookups against the cache. Number  
size Indicates the size of cache as configured. MB Fine tune this value based on actual cache usage.
entriesCount Indicates the number of cache entries during the last measurement period. Number  
totalsize Indicates the size of cache as configured. Percent A high value for this measure indicates that the client is using the maximum amount of allocated connections.
returnLocalStats Indicates the number of local (from the local shard) response to a “retrieve stats” shard request. Number  
mergeToGlobalStats Indicates the number of process shard responses that contain partial local stats. Usually this entails combining per-share stats for each term. Number