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https://issues.apache.org/jira/browse/HIVE-23952?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ashutosh Chauhan resolved HIVE-23952.
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Fix Version/s: 4.0.0
Resolution: Fixed
Pushed to master. Thanks, [~mustafaiman]
> Reuse VectorAggregationBuffer to reduce GC pressure in VectorGroupByOperator
> ----------------------------------------------------------------------------
>
> Key: HIVE-23952
> URL: https://issues.apache.org/jira/browse/HIVE-23952
> Project: Hive
> Issue Type: Bug
> Reporter: Rajesh Balamohan
> Assignee: Mustafa Iman
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0
>
> Attachments: Screenshot 2020-07-30 at 7.38.13 AM.png
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> !Screenshot 2020-07-30 at 7.38.13 AM.png|width=1171,height=892!
> [https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/exec/vector/VectorGroupByOperator.java]
> {code:java}
> aggregationBuffer = allocateAggregationBuffer(); {code}
> Flushed out aggregation buffers could be reused instead of allocating
> everytime here, to reduce GC pressure.
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