halilduygulu commented on issue #14338:
URL: https://github.com/apache/airflow/issues/14338#issuecomment-783315440


   I think in airflow 2 subdags are considered as a task instance and a dagrun, 
so when i have 15 subdags in a dag and set scheduler level general concurrency 
to 15, I have no running task instance slot left for actual tasks since subdag 
operator is holding up scheduler to create task instances. 


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