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https://issues.apache.org/jira/browse/SPARK-20950?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan reassigned SPARK-20950:
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Assignee: caoxuewen
> add a new config to diskWriteBufferSize which is hard coded before
> ------------------------------------------------------------------
>
> Key: SPARK-20950
> URL: https://issues.apache.org/jira/browse/SPARK-20950
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 2.2.0
> Reporter: caoxuewen
> Assignee: caoxuewen
> Priority: Trivial
> Fix For: 2.3.0
>
>
> This PR Improvement in two:
> 1.With spark.shuffle.spill.diskWriteBufferSize configure diskWriteBufferSize
> of ShuffleExternalSorter.
> when change the size of the diskWriteBufferSize to test forceSorterToSpill
> The average performance of running 10 times is as follows:(their unit is MS).
>
> {quote}diskWriteBufferSize: 1M 512K 256K 128K 64K 32K
> 16K 8K 4K
> ---------------------------------------------------------------------------------------
> RecordSize = 2.5M 742 722 694 686 667 668 671
> 669 683
> RecordSize = 1M 294 293 292 287 283 285 281
> 279 285{quote}
>
> 2.Remove outputBufferSizeInBytes and inputBufferSizeInBytes to initialize in
> mergeSpillsWithFileStream function
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