[jira] [Commented] (SPARK-5845) Time to cleanup spilled shuffle files not included in shuffle write time

["Apache Spark (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-5845?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14355638#comment-14355638 ] 

Apache Spark commented on SPARK-5845:
-------------------------------------

User 'ilganeli' has created a pull request for this issue:
https://github.com/apache/spark/pull/4965

> Time to cleanup spilled shuffle files not included in shuffle write time
> ------------------------------------------------------------------------
>
>                 Key: SPARK-5845
>                 URL: https://issues.apache.org/jira/browse/SPARK-5845
>             Project: Spark
>          Issue Type: Bug
>          Components: Shuffle
>    Affects Versions: 1.3.0, 1.2.1
>            Reporter: Kay Ousterhout
>            Assignee: Ilya Ganelin
>            Priority: Minor
>
> When the disk is contended, I've observed cases when it takes as long as 7 seconds to clean up all of the intermediate spill files for a shuffle (when using the sort based shuffle, but bypassing merging because there are <=200 shuffle partitions).  This is even when the shuffle data is non-huge (152MB written from one of the tasks where I observed this).  This is effectively part of the shuffle write time (because it's a necessary side effect of writing data to disk) so should be added to the shuffle write time to facilitate debugging.



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