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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