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https://issues.apache.org/jira/browse/SOLR-14914?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrzej Bialecki updated SOLR-14914:
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Fix Version/s: master (9.0)
> Add option to disable metrics collection
> ----------------------------------------
>
> Key: SOLR-14914
> URL: https://issues.apache.org/jira/browse/SOLR-14914
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Components: metrics
> Reporter: Andrzej Bialecki
> Assignee: Andrzej Bialecki
> Priority: Major
> Fix For: master (9.0)
>
>
> Some users have expressed concerns about the overhead of metrics collection,
> and consequently the need to have an option to turn off the metrics
> collection altogether.
> Metrics instrumentation in Solr cannot be itself easily removed or bypassed -
> in order to provide fine-grained metrics many code paths had to be changed
> and they now expect the metrics to be present (non-null). However, we can use
> the mechanism of {{MetricSupplier}} to use no-op implementation of all
> metrics, which would reduce the CPU overhead to basically the cost of an
> empty method call, and the memory overhead to a HashMap entry in a
> {{MetricRegistry}} (metric names still need to be tracked).
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