Monitoring concurrency scaling - Amazon Redshift
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Monitoring concurrency scaling

You can see whether a query is running on the main cluster or a concurrency scaling cluster by navigating to Cluster in the Amazon Redshift console and choosing a cluster. Then choose the Query monitoring tab and Workload concurrency to view information about running queries and queued queries.

To find execution times, query the STL_QUERY table and filter on the concurrency_scaling_status column. The following query compares the queue time and execution time for queries run on the concurrency scaling cluster and queries run on the main cluster.

SELECT w.service_class AS queue
, CASE WHEN q.concurrency_scaling_status = 1 THEN 'concurrency scaling cluster' ELSE 'main cluster' END as concurrency_scaling_status
, COUNT( * ) AS queries
, SUM( q.aborted ) AS aborted
, SUM( ROUND( total_queue_time::NUMERIC / 1000000,2) ) AS queue_secs
, SUM( ROUND( total_exec_time::NUMERIC / 1000000,2) ) AS exec_secs
FROM stl_query q
JOIN stl_wlm_query w
USING (userid,query)
WHERE q.userid > 1
AND q.starttime > '2019-01-04 16:38:00'
AND q.endtime < '2019-01-04 17:40:00'
GROUP BY 1,2
ORDER BY 1,2;

Adjust the starttime and endtime values according to your requirements.