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https://issues.apache.org/jira/browse/HIVE-9251?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rui Li updated HIVE-9251:
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Attachment: HIVE-9251.2-spark.patch
Thanks [~jxiang] and [~xuefuz]. Upload another patch. I didn't remove the
memory per task data in case we'll need it in future. For now, it's only used
to print a warning if bytes per reducer is much larger than memory per reducer.
Would like to know your opinions.
> SetSparkReducerParallelism is likely to set too small number of reducers
> [Spark Branch]
> ---------------------------------------------------------------------------------------
>
> Key: HIVE-9251
> URL: https://issues.apache.org/jira/browse/HIVE-9251
> Project: Hive
> Issue Type: Sub-task
> Components: Spark
> Reporter: Rui Li
> Assignee: Rui Li
> Attachments: HIVE-9251.1-spark.patch, HIVE-9251.2-spark.patch
>
>
> This may hurt performance or even lead to task failures. For example, spark's
> netty-based shuffle limits the max frame size to be 2G.
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