Rajesh Balamohan created HIVE-23952:
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Summary: 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
Attachments: Screenshot 2020-07-30 at 7.38.13 AM.png
!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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