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https://issues.apache.org/jira/browse/AIRFLOW-4419?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16829703#comment-16829703
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ASF subversion and git services commented on AIRFLOW-4419:
----------------------------------------------------------

Commit d63b6c9a5d3f8dfcb959daf93dd55dcb710d0e38 in airflow's branch 
refs/heads/master from Kevin Yang
[ https://gitbox.apache.org/repos/asf?p=airflow.git;h=d63b6c9 ]

[AIRFLOW-4419] Refine concurrency check in scheduler (#5194)



> Concurrency calculation in scheduler is slow and has a bug
> ----------------------------------------------------------
>
>                 Key: AIRFLOW-4419
>                 URL: https://issues.apache.org/jira/browse/AIRFLOW-4419
>             Project: Apache Airflow
>          Issue Type: Improvement
>            Reporter: Kevin Yang
>            Assignee: Kevin Yang
>            Priority: Minor
>
> The pool, dag and task concurrency calculation logic is slow and can be 
> optimized. Also current task concurrency should not increase if the executor 
> already has the task.



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