kaxil commented on a change in pull request #16926:
URL: https://github.com/apache/airflow/pull/16926#discussion_r667491445
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File path: docs/apache-airflow/best-practices.rst
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@@ -109,6 +109,9 @@ or if you need to deserialize a json object from the
variable :
{{ var.json.<variable_name> }}
+Alternative option is to read from the environment variables in the top level
python code instead of Airflow variables.
+This will avoid new connections to Airflow metadata DB everytime Airflow
parses the python file.
Review comment:
From Airflow >= 1.10.10 -- you can use Environment Variables to set
Airflow Variables, hence connections to DB are not made.
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