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https://issues.apache.org/jira/browse/AIRFLOW-3607?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17126649#comment-17126649
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ASF subversion and git services commented on AIRFLOW-3607:
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Commit 32ef0cd717d181b9f0c37caae312404385a5c9dd in airflow's branch
refs/heads/master from amichai07
[ https://gitbox.apache.org/repos/asf?p=airflow.git;h=32ef0cd ]
[AIRFLOW-3607] Optimize dep checking when depends on past set and concurrency
limit
> Decreasing scheduler delay between tasks
> ----------------------------------------
>
> Key: AIRFLOW-3607
> URL: https://issues.apache.org/jira/browse/AIRFLOW-3607
> Project: Apache Airflow
> Issue Type: Improvement
> Components: scheduler
> Affects Versions: 1.10.0, 1.10.1, 1.10.2
> Environment: ubuntu 14.04
> Reporter: Amichai Horvitz
> Assignee: Amichai Horvitz
> Priority: Major
> Fix For: 2.0.0
>
> Original Estimate: 336h
> Remaining Estimate: 336h
>
> I came across the TODO in airflow/ti_deps/deps/trigger_rule_dep (line 52)
> that says instead of checking the query for every task let the tasks report
> to the dagrun. I have a dag with many tasks and the delay between tasks can
> rise to 10 seconds or more, I already changed the configuration, added
> processes and memory, checked the code and did research, profiling and other
> experiments. I hope that this change will make a drastic change in the delay.
> I would be happy to discuss this solution, the research and other solutions
> for this issue.
> Thanks
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