[jira] [Created] (AIRFLOW-5096) reduce the number of times the pickle is inserted into the database by modifying the hash field of Dag

["MeiK (JIRA)" <ji...@apache.org>]

MeiK created AIRFLOW-5096:
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             Summary: reduce the number of times the pickle is inserted into the database by modifying the hash field of Dag
                 Key: AIRFLOW-5096
                 URL: https://issues.apache.org/jira/browse/AIRFLOW-5096
             Project: Apache Airflow
          Issue Type: Improvement
          Components: DAG
    Affects Versions: 1.10.3
            Reporter: MeiK
            Assignee: MeiK


After the scheduler has the --do_pickle option turned on, the scheduler will insert all the file pickles into the database each time it scans the file, which will cause the database to swell rapidly.

In my opinion, the main reason is because the hash function that determines whether the dag is the same as the pickle version uses the last_loaded field, which changes every time it is read instead of modified. Therefore, airflow inserts a large amount of unchanging data into the database.

I created a commit in which the last modified time of the file was used instead of last_loaded as the hash field, which works fine on my computer. Please let me know if you have a better way.

English is not my native language; please excuse typing errors.



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