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From "Tim Armstrong (JIRA)" <j...@apache.org>
Subject [jira] [Created] (IMPALA-5618) Performance regresses on buffer pool dev branch for high-ndv aggregations
Date Thu, 06 Jul 2017 00:52:00 GMT
Tim Armstrong created IMPALA-5618:
-------------------------------------

             Summary: Performance regresses on buffer pool dev branch for high-ndv aggregations
                 Key: IMPALA-5618
                 URL: https://issues.apache.org/jira/browse/IMPALA-5618
             Project: IMPALA
          Issue Type: Sub-task
          Components: Backend
    Affects Versions: Impala 2.10.0
            Reporter: Tim Armstrong
            Assignee: Tim Armstrong


The extra time appears to be in AddRowCustom() via PartitionedAggregationNode::ConstructIntermediateTuple().
I think allocating the boost::function object is causing the slowdown.



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