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Posted to issues@spark.apache.org by "Reynold Xin (JIRA)" <ji...@apache.org> on 2017/09/29 04:30:00 UTC

[jira] [Resolved] (SPARK-22160) Allow changing sample points per partition in range shuffle exchange

     [ https://issues.apache.org/jira/browse/SPARK-22160?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Reynold Xin resolved SPARK-22160.
---------------------------------
       Resolution: Fixed
    Fix Version/s: 2.3.0

> Allow changing sample points per partition in range shuffle exchange
> --------------------------------------------------------------------
>
>                 Key: SPARK-22160
>                 URL: https://issues.apache.org/jira/browse/SPARK-22160
>             Project: Spark
>          Issue Type: New Feature
>          Components: SQL
>    Affects Versions: 2.2.0
>            Reporter: Reynold Xin
>            Assignee: Reynold Xin
>             Fix For: 2.3.0
>
>
> Spark's RangePartitioner hard codes the number of sampling points per partition to be 20. This is sometimes too low. This ticket makes it configurable, via spark.sql.execution.rangeExchange.sampleSizePerPartition, and raises the default in Spark SQL to be 100.



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