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https://issues.apache.org/jira/browse/SOLR-15301?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17423898#comment-17423898
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Andras Salamon commented on SOLR-15301:
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In this Jira my original problem was that we called the metric calculation
once, which calculated the index size three times. Since this is three
different gauges, CachedGauge was not useful for here. If we call metrics too
frequently, CacheGauge can be very useful, I think we should address that in a
different jira.
> Eliminate repetitive index size calculation for Solr metrics
> ------------------------------------------------------------
>
> Key: SOLR-15301
> URL: https://issues.apache.org/jira/browse/SOLR-15301
> Project: Solr
> Issue Type: Improvement
> Components: metrics
> Reporter: Andras Salamon
> Assignee: Andras Salamon
> Priority: Minor
> Fix For: main (9.0)
>
> Time Spent: 40m
> Remaining Estimate: 0h
>
> During metrics calculation Solr asks for core indexSize three times. Twice in
> SolrCore and once in ReplicationHandler. It slows down metrics calculation
> and it is also possible that these three reported values are not exactly the
> same if size changes during calculation.
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