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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2016/05/26 18:56:12 UTC
[jira] [Commented] (SPARK-15569) Executors spending significant
time in DiskObjectWriter.updateBytesWritten function
[ https://issues.apache.org/jira/browse/SPARK-15569?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15302691#comment-15302691 ]
Apache Spark commented on SPARK-15569:
--------------------------------------
User 'sitalkedia' has created a pull request for this issue:
https://github.com/apache/spark/pull/13332
> 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
>
> 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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