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https://issues.apache.org/jira/browse/SPARK-16862?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15405245#comment-15405245
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Apache Spark commented on SPARK-16862:
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User 'tejasapatil' has created a pull request for this issue:
https://github.com/apache/spark/pull/14475
> Configurable buffer size in `UnsafeSorterSpillReader`
> -----------------------------------------------------
>
> Key: SPARK-16862
> URL: https://issues.apache.org/jira/browse/SPARK-16862
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 2.0.0
> Reporter: Tejas Patil
> Priority: Minor
>
> `BufferedInputStream` used in `UnsafeSorterSpillReader` uses the default 8k
> buffer to read data off disk. This could be made configurable to improve on
> disk reads.
> https://github.com/apache/spark/blob/master/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeSorterSpillReader.java#L53
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