milton0825 edited a comment on issue #4949: [AIRFLOW-1557] Backfill should respect pool limit URL: https://github.com/apache/airflow/pull/4949#issuecomment-475507984 @feng-tao The description is correct. The backfill should either be limited by the default `non_pooled_backfill_task_slot_count` or the pool specified through `backfill --pool`. I think we should use a different pool for backfill instead of re-using the pool used by the normal scheduling. We can prevent backfill tasks from occupying all the pool slots and starve the normal tasks.
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