Kevin Yang created AIRFLOW-3392:
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             Summary: Add index on dag_id in sla_miss table
                 Key: AIRFLOW-3392
                 URL: https://issues.apache.org/jira/browse/AIRFLOW-3392
             Project: Apache Airflow
          Issue Type: Improvement
            Reporter: Kevin Yang
            Assignee: Kevin Yang


The select queries on sla_miss table produce a great % of DB traffic and thus 
made the DB CPU usage unnecessarily high. It would be a low hanging fruit to 
add an index and reduce the load.



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