raphaelauv commented on PR #69705:
URL: https://github.com/apache/airflow/pull/69705#issuecomment-5210130314

   hey about "enough to cause task failures"
   
   if it can happen then it will happen again ( backfill , new dags , big clear 
... )
   
   your tasks fail because you did not put correct/perfect limit on concurrency.
   
   I know it's not easy : 
   
   yes airflow pools are too simple for many use-case
   
   yes airflow is not kubernetes ressource aware ( he do not know your max 
hardware scaling limits and don't queue tasks regarding this ) 
   
   ---
   
   "but never spread the fire times apart at the source."
   
   I've a stack triggering more than a thousand of dag_run at midnight , yes it 
take almost 30 seconds to the scheduler to do so , but no errors , did you 
encounter a scheduler error ?


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