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Posted to commits@airflow.apache.org by GitBox <gi...@apache.org> on 2021/09/03 21:32:37 UTC

[GitHub] [airflow] ephraimbuddy commented on issue #18023: Many queued Dagruns created for DagRuns with a start_date in the past

ephraimbuddy commented on issue #18023:
URL: https://github.com/apache/airflow/issues/18023#issuecomment-912822201


   > This can potentially impact the time to move a DagRun from queued to running, as the _start_queued_dagruns function has to iterate through the entire set of queued DagRuns (looking at max_dagruns_per_loop_to_schedule at a time) before it re-examines a given DagRun.
   
   It doesn't go through the entire dagruns. It goes through a subset controlled by `max_dagruns_per_loop_to_schedule`. And dagruns returned are ordered by `last_scheduling_decision`,  unless you are seeing a performance impact?


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