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https://issues.apache.org/jira/browse/SOLR-14691?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17209643#comment-17209643
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ASF subversion and git services commented on SOLR-14691:
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Commit 43b1a2fdc7a4bf8e5c8409013d07858dec6d0c35 in lucene-solr's branch
refs/heads/master from Andrzej Bialecki
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=43b1a2f ]
SOLR-14691: Metrics reporting should avoid creating objects.
> Metrics reporting should avoid creating objects
> -----------------------------------------------
>
> Key: SOLR-14691
> URL: https://issues.apache.org/jira/browse/SOLR-14691
> Project: Solr
> Issue Type: Improvement
> Components: metrics
> Reporter: Andrzej Bialecki
> Assignee: Andrzej Bialecki
> Priority: Critical
> Fix For: 8.7
>
> Time Spent: 1.5h
> Remaining Estimate: 0h
>
> {{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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