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

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Impala 2.10.0
• Fix Version/s: Impala 2.10.0
• Component/s: Backend
• Labels: performance
• Target Version: Impala 2.10.0
• Epic Color: ghx-label-9
• Assignee: Tim Armstrong
• Reporter: Tim Armstrong
• Created: 06/Jul/17 00:51
• Updated: 07/Jul/17 18:02
• Resolved: 07/Jul/17 18:02

Description

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