suxin1995 commented on issue #14924:
URL: https://github.com/apache/airflow/issues/14924#issuecomment-810929124


   In my produce env.
   
   used :
   linux release: Debain
   airflow version:  2.0.1
   exeucutor = CeleryExecutor
   max_active_dag_runs_per_dag=32
   parallelism=32
   dag_concurrency=16
   sql_Alchemy_pool_size=16
   sql_Alchemy_max_overflow=16
   
   about 3 workers,40 dags, 1000 tasks. Many tasks keep `scheduled` status 
sometimes  and canot keep running. 
   when  I  call cron script to restart process every hour.The problem haved 
sloved.
   


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