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Posted to issues@impala.apache.org by "Tim Armstrong (JIRA)" <ji...@apache.org> on 2017/07/06 00:52:00 UTC

[jira] [Created] (IMPALA-5618) Performance regresses on buffer pool dev branch for high-ndv aggregations

Tim Armstrong created IMPALA-5618:
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             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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