[jira] [Created] (SOLR-14691) Metrics reporting should avoid creating objects

["Andrzej Bialecki (Jira)" <ji...@apache.org>]

Andrzej Bialecki created SOLR-14691:
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             Summary: Metrics reporting should avoid creating objects
                 Key: SOLR-14691
                 URL: https://issues.apache.org/jira/browse/SOLR-14691
             Project: Solr
          Issue Type: Improvement
      Security Level: Public (Default Security Level. Issues are Public)
          Components: metrics
            Reporter: Andrzej Bialecki


{{MetricUtils}} unnecessarily creates a lot of short-lived objects (maps and lists). This affects GC, especially since metrics are frequently polled by clients. We should refactor it to use {{MapWriter}} as much as possible.

Alternatively we could provide our wrappers or subclasses of Codahale metrics that implement {{MapWriter}}, then a lot of complexity in {{MetricUtils}} wouldn't be needed at all.



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