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From "Andrew Or (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (SPARK-15569) Executors spending significant time in DiskObjectWriter.updateBytesWritten function
Date Fri, 27 May 2016 18:23:12 GMT

     [ https://issues.apache.org/jira/browse/SPARK-15569?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrew Or resolved SPARK-15569.
-------------------------------
          Resolution: Fixed
            Assignee: Sital Kedia
       Fix Version/s: 2.0.0
    Target Version/s: 2.0.0

> Executors spending significant time in DiskObjectWriter.updateBytesWritten function
> -----------------------------------------------------------------------------------
>
>                 Key: SPARK-15569
>                 URL: https://issues.apache.org/jira/browse/SPARK-15569
>             Project: Spark
>          Issue Type: Bug
>          Components: Shuffle
>            Reporter: Sital Kedia
>            Assignee: Sital Kedia
>             Fix For: 2.0.0
>
>
> Profiling a Spark job spilling large amount of intermediate data we found that significant
portion of time is being spent in DiskObjectWriter.updateBytesWritten function. Looking at
the code (https://github.com/sitalkedia/spark/blob/master/core/src/main/scala/org/apache/spark/storage/DiskBlockObjectWriter.scala#L206),
we see that the function is being called too frequently to update the number of bytes written
to disk. We should reduce the frequency to avoid this. 



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