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https://issues.apache.org/jira/browse/SPARK-7932?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14564065#comment-14564065
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Apache Spark commented on SPARK-7932:
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User 'kayousterhout' has created a pull request for this issue:
https://github.com/apache/spark/pull/6484
> Scheduler delay shown in event timeline is incorrect
> ----------------------------------------------------
>
> Key: SPARK-7932
> URL: https://issues.apache.org/jira/browse/SPARK-7932
> Project: Spark
> Issue Type: Bug
> Components: Web UI
> Reporter: Kay Ousterhout
> Assignee: Kay Ousterhout
> Priority: Minor
>
> In StagePage.scala, we round *down* to the nearest percent when computing the
> proportion of a task's time spend in each phase of execution. Scheduler
> delay is computed by taking 100 - sum(all other proportions), which means
> that a few extra percent may go into the scheduler delay. As a result,
> scheduler delay can appear larger in the visualization than it actually is.
> cc [~shivaram]
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