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https://issues.apache.org/jira/browse/AIRFLOW-2393?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16468984#comment-16468984
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ASF subversion and git services commented on AIRFLOW-2393:
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Commit 2a55ffe0cd2c04fde2eecdbeff2fa727067069e1 in incubator-airflow's branch
refs/heads/master from Tao feng
[ https://git-wip-us.apache.org/repos/asf?p=incubator-airflow.git;h=2a55ffe ]
[AIRFLOW-2086][AIRFLOW-2393] Customize default dagrun number in tree view
Closes #3279 from feng-tao/reduce-tree-view
This introduces a new configuration variable to set the default
number of dag runs displayed in the tree view. For large DAGs, this
could cause timeouts in the webserver.
> UI tree view struggles with large dags (60 tasks)x25 dag histories
> ------------------------------------------------------------------
>
> Key: AIRFLOW-2393
> URL: https://issues.apache.org/jira/browse/AIRFLOW-2393
> Project: Apache Airflow
> Issue Type: Improvement
> Components: ui
> Affects Versions: 1.9.0
> Reporter: Badger
> Priority: Major
>
> Hi,
> We are noticing the tree view is taking a long time to render as our DAG has
> become more complex. We will need to start breaking our dag apart in order to
> continue to use the user interface.
> The basic problem is that a reasonably complex DAG (60 operators) x the
> standard 25 dag run histories on the tree view causes a 350MB json response
> (compressed to 8MB) to be downloaded, this then needs the browser to render
> it.
> On quick observation this appears to be because, the response appears to
> contain all meta-data for each task.
> Is this something others think is a problem. We occasionally have to refresh
> due to memory errors and have already increased the RAM allocated to the box.
> A suggestion might be to load specific instance history when a user hovers
> over the task, rather than exporting all of the history on page load. I'd
> look at contributing a PR but haven't had chance to take a look at this area
> of the code base.
> Thanks
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