[jira] [Resolved] (SOLR-17799) Revamp segment merge metrics

["David Smiley (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-17799?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

David Smiley resolved SOLR-17799.
---------------------------------
    Fix Version/s: main (10.0)
       Resolution: Fixed

> 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
>              Labels: pull-request-available
>             Fix For: main (10.0)
>
>          Time Spent: 2h 20m
>  Remaining Estimate: 0h
>
> 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).
> Relates to original feature from https://issues.apache.org/jira/browse/SOLR-9854



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