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https://issues.apache.org/jira/browse/HIVE-20364?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ashutosh Chauhan resolved HIVE-20364.
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Resolution: Fixed
Taken care of in HIVE-20656
> Update default for hive.map.aggr.hash.min.reduction
> ---------------------------------------------------
>
> Key: HIVE-20364
> URL: https://issues.apache.org/jira/browse/HIVE-20364
> Project: Hive
> Issue Type: Improvement
> Components: Configuration
> Reporter: Nita Dembla
> Assignee: Ashutosh Chauhan
> Priority: Major
> Fix For: 4.0.0
>
> Attachments: HIVE-20364.patch
>
>
> Default value is 0.5 Lets update it to 0.99
> In average case its a trade-off between cpu vs network. Erring on side of CPU
> is better since perf loss caused by network is usually larger.
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