Expose query response statistics #66
Description
Expose query response stats in pinot-dbapi including:
- NumServersQueried
- NumServersResponded
- NumSegmentsQueried
- NumSegmentsProcessed
- NumSegmentsMatched
- NumConsumingSegmentsQueried
- NumDocsScanned
- NumEntriesScannedInFilter
- NumEntriesScannedPostFilter
- NumGroupsLimitReached
- TotalDocs
- TimeUsedMs
- MinConsumingFreshnessTimeMs
- NumSegmentsPrunedByBroker
Can we also expose all broker metrics here:
https://docs.pinot.apache.org/configuration-reference/monitoring-metrics#pinot-broker