Using Ambari Core Services
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Druid Query

Metrics to see status of Druid queries.

Table 1. Druid Query metrics descriptions
Row Metrics Description
QUERY TIME METRICS Broker Query Time Average Time taken by Druid Broker node to process queries.
Historical Query Time Average time taken by Druid historical nodes to process queries.
Realtime Query Time Average time taken by Druid real time nodes to process queries.
SEGMENT SCAN METRICS Historical Segment Scan Time Average time taken by Druid historical nodes to scan individual segments.
Realtime Segment Scan Time Average time taken by Druid real time nodes to scan individual segments.
Historical Query Wait Time Average time spent waiting for a segment to be scanned on historical node.
Realtime Query Wait Time Average time spent waiting for a segment to be scanned on real time node.
Pending Historical Segment Scans Average Number of pending segment scans on historical nodes.
Pending Realtime Segment Scans Average Number of pending segment scans on real time nodes.