Merge Metrics

Metric Name	Type	Components	Purpose
merge_success	Counter	Count of merge successes.
merge_failure	Counter	Count of merge successes.
query_count	Counter	Merge calls to the catalog.
query_failure	Counter	Merge failed catalog calls.
query_latency_summary	Counter	Latency in calls to catalog.
query_latency_summary_count/sum	Counter	Latency in calls to catalog.
merge_duration_histo_bucket/count/sum	Histogram	Merge processing duration, in milliseconds.
merge_duration_summary	Summary	Merge processing duration, in milliseconds.