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https://issues.apache.org/jira/browse/SPARK-22160?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-22160:
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Assignee: Reynold Xin (was: Apache Spark)
> 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
>
> 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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