[GitHub] [airflow] ashb edited a comment on pull request #20975: Switch XCom implementation to use run_id

[GitBox <gi...@apache.org>]

ashb edited a comment on pull request #20975:
URL: https://github.com/apache/airflow/pull/20975#issuecomment-1030097238


   I'm performance testing this now. Currently running locally with just shy of 300k XCom rows (about 50% of which have a matching DagRun row)
   
   Not looking promising so far:
   
   ```
   query            | INSERT INTO __airflow_tmp_xcom SELECT dag_run.id, xcom.task_id, xcom.key, xcom.value, xcom.timestamp, xcom.dag_id, dag_run.run_id +
                    | FROM xcom JOIN dag_run ON xcom.dag_id = dag_run.dag_id
   ?column?         | 00:06:15.036453
   ```


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