[GitHub] [airflow] msumit commented on issue #5594: [AIRFLOW-4924] Loading DAGs asynchronously in Airflow webserver

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msumit commented on issue #5594: [AIRFLOW-4924] Loading DAGs asynchronously in Airflow webserver
URL: https://github.com/apache/airflow/pull/5594#issuecomment-511755626
 
 
   Thanks for much-needed improvement in webserver @coufon. I would like to understand more about the workings of this enhancement:
   
   - So each gunicorn worker going to launch a separate thread to parse DAGs asynchronously, and not a single background process going to do the DAG parsing for all the workers. 
   
   - The pickled DAG object won't be stored into DB and just used for thread communication.
   
   - As of now each gunicorn worker might have diff copy of DAGs (due to changes) and cause confusion on UI, something which isn't going to solve with this change. 
   
   - How it going to behave if DAG parsing time for each thread is more than the configured `collect_dags_interval` time.
   

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