[jira] [Created] (AIRFLOW-4596) Capture stats for dagrun schedule delay for adhoc/nonschduled task

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

Himanshu Garg created AIRFLOW-4596:
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             Summary: Capture stats for dagrun schedule delay for adhoc/nonschduled task
                 Key: AIRFLOW-4596
                 URL: https://issues.apache.org/jira/browse/AIRFLOW-4596
             Project: Apache Airflow
          Issue Type: New Feature
          Components: models
    Affects Versions: 1.10.3
            Reporter: Himanshu Garg
            Assignee: Himanshu Garg


With respect to the metric we are capturing in airflow version v1-10 - https://github.com/apache/airflow/blob/v1-10-stable/docs/metrics.rst. The Timer merics `dagrun.schedule_delay.<dag_id>` `Seconds of delay between the scheduled DagRun start date and the actual DagRun start date`
we are capturig the delay of only schduled Dags.


But we can also include delay in the adhoc/non-scheduled Dags by capturing the difference between `start_date` in `dag_run` table and `start_date` in `task_instance` table keeping the `dag_id` and `excecution` date as the cardinality for performing join.



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