Kevin Liang created SOLR-17799:
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Summary: Revamp segment merge metrics
Key: SOLR-17799
URL: https://issues.apache.org/jira/browse/SOLR-17799
Project: Solr
Issue Type: Improvement
Reporter: Kevin Liang
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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