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https://issues.apache.org/jira/browse/SOLR-17799?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17986618#comment-17986618
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David Smiley commented on SOLR-17799:
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+1
> Revamp segment merge metrics
> ----------------------------
>
> Key: SOLR-17799
> URL: https://issues.apache.org/jira/browse/SOLR-17799
> Project: Solr
> Issue Type: Improvement
> Reporter: Kevin Liang
> Priority: Minor
>
> Based on current
> [documentation|https://solr.apache.org/guide/solr/latest/deployment-guide/metrics-reporting.html#index-merge-metrics]
> for segment merge metrics, there are two major groups of metrics emitted
> (for currently actively running merges and for merges that have completed).
> The actively running ones are gauges that can go up or down, while the ones
> for completed are counters/timers.
> To make these metrics more consistent and aggregate-able, propose emitting
> all metrics for merges as running counters for # of merges, # of segments,
> and # of documents with a metric for each tracking started/completed (thus
> active merges can be calculated via the current diff between the two).
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