[GitHub] [airflow] potiuk edited a comment on issue #6515: [AIRFLOW-XXX] GSoD: How to make DAGs production ready

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potiuk edited a comment on issue #6515: [AIRFLOW-XXX] GSoD: How to make DAGs production ready
URL: https://github.com/apache/airflow/pull/6515#issuecomment-551469402
 
 
   @KKcorps I think one of the important things to mention in this document is database access and especially avoiding to use Airflow Variables in the DAGs (they are still ok to use in "execute" method). 
   
   This is a know problem that people are complaining a lot that scheduler opens and closes a lot of connections to the database - because every time the file is parsed, and variable is reached, a database connection is opened and query executed.
   
   I think there are lots of examples around with using variables in the DAGs but this is not really a good practice and I think this is a perfect place to mention it. @kaxil @ashb @mik-laj  - what are your thoughts about it ?
   
   
   

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