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Use case 6: Determine the optimum size of a node query cache
Consult the following use case for information on how to achieve value with PATROL for Elasticsearch.
The application administrator should be able to determine the optimum size of a node query cache.
Workflow
Set up data collection
Configure Elasticsearch policy from the TrueSight console.
Create and monitor the application
Check the following attributes to determine if there are evictions from a node query cache. If the cache size is more, it can accommodate more results, thus reducing the evictions. Evictions ratio shows the ratio of the eviction count to total items in the cache.
Query cache evictions ratio (Node)
Benefits
Continuous monitoring helps you identify the nodes that need correction in query cache size.
