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https://issues.apache.org/jira/browse/SPARK-3983?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kay Ousterhout updated SPARK-3983:
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Comment: was deleted
(was: This is especially problematic when debugging performance of short tasks
(that run in 10s of milliseconds), when the scheduler delay can be very large
relative to the task duration.)
> Scheduler delay (shown in the UI) is incorrect
> ----------------------------------------------
>
> Key: SPARK-3983
> URL: https://issues.apache.org/jira/browse/SPARK-3983
> Project: Spark
> Issue Type: Bug
> Reporter: Kay Ousterhout
> Assignee: Kay Ousterhout
> Fix For: 1.2.0
>
>
> The reported scheduler delay includes time to get a new thread (from a
> threadpool) in order to start the task, time to deserialize the task, and
> time to serialize the result. None of these things are delay caused by the
> scheduler; including them as such is misleading.
> cc [~sparks] [~shivaram]
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