title: Redshift concurrency scaling
body: <p>We have enabled concurrency scaling, SQA, and auto WLM on a Redshift cluster with RA3 nodes. For some reason all queries run on the main cluster and no concurrency scaling cluster is launched even though the queries on the main cluster are queuing up a lot, e.g. one query was queued for 500s and then executed in 2s.</p>
  
  <p>We get the following message in relation to it: </p>
  
  <p>Concurrency Scaling inelegible query - Cumulative time not met</p>
  
  <p>Concurrency Scaling ineligible query - Query has state on Main cluster</p>
  
  <p>The docs don't say anything about what this could mean</p>
  
  <p>Does concurrency scaling and SQA work at all?</p>