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Posted to dev@hive.apache.org by "Rajesh Balamohan (Jira)" <ji...@apache.org> on 2020/07/14 04:18:00 UTC

[jira] [Created] (HIVE-23843) Improve key evictions in VectorGroupByOperator

Rajesh Balamohan created HIVE-23843:
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             Summary: Improve key evictions in VectorGroupByOperator
                 Key: HIVE-23843
                 URL: https://issues.apache.org/jira/browse/HIVE-23843
             Project: Hive
          Issue Type: Improvement
          Components: Hive
            Reporter: Rajesh Balamohan


Keys in {{mapKeysAggregationBuffers}} are evicted in random order. Tasks also get into GC issues when multiple keys are involved in groupbys. It would be good to provide an option to have LRU based eviction for mapKeysAggregationBuffers.



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