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https://issues.apache.org/jira/browse/HIVE-13293?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lifeng Wang updated HIVE-13293:
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Description:
I use TPCx-BB to do some performance test on Hive on Spark engine. And found
query 10 has performance degradation when enabling parallel order by.
It seems that sampling cost much time before running the real query.
was:I use TPCx-BB to do some performance test on Hive on Spark engine. And
found query 10 has performance degradation when enabling parallel order by.
> Query occurs performance degradation after enabling parallel order by for
> Hive on sprak
> ---------------------------------------------------------------------------------------
>
> Key: HIVE-13293
> URL: https://issues.apache.org/jira/browse/HIVE-13293
> Project: Hive
> Issue Type: Bug
> Components: Spark
> Affects Versions: 2.0.0
> Reporter: Lifeng Wang
>
> I use TPCx-BB to do some performance test on Hive on Spark engine. And found
> query 10 has performance degradation when enabling parallel order by.
> It seems that sampling cost much time before running the real query.
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