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Posted to dev@hive.apache.org by "Rajesh Balamohan (JIRA)" <ji...@apache.org> on 2017/01/09 06:37:58 UTC

[jira] [Created] (HIVE-15565) LLAP: GroupByOperator flushes hash table too frequently

Rajesh Balamohan created HIVE-15565:
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             Summary: LLAP: GroupByOperator flushes hash table too frequently
                 Key: HIVE-15565
                 URL: https://issues.apache.org/jira/browse/HIVE-15565
             Project: Hive
          Issue Type: Bug
          Components: llap
            Reporter: Rajesh Balamohan
            Priority: Minor


{{GroupByOperator::isTez}} would be true in LLAP mode. Current memory computations can go wrong with {{isTez}} checks in {{GroupByOperator}}. For e.g, in a LLAP instance with Xmx128G and 12 executors, it would start flushing hash table for every record once it reaches around 42GB (hive.tez.container.size=7100, hive.map.aggr.hash.percentmemory=0.5).




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