[IMPALA-3525] Regression in Hash table BuildPartition introduce between Apr 22 <-> Apr 20

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Not A Bug
• Affects Version/s: Impala 2.6.0
• Fix Version/s: Impala 2.6.0
• Component/s: Backend
• Target Version: Impala 2.6.0
• Assignee: Mostafa Mokhtar
• Reporter: Mostafa Mokhtar
• Created: 11/May/16 23:01
• Updated: 14/May/16 21:47
• Resolved: 14/May/16 21:47

Description

Assigning to myself till I find the check-in causing the regression.

Baseline

   HASH_JOIN_NODE (id=2):(Total: 2m34s, non-child: 2m14s, % non-child: 86.78%)
         - BuildPartitionTime: 15s542ms
         - BuildRows: 30.00M (30000000)
         - BuildTime: 11s840ms

Regression

   HASH_JOIN_NODE (id=2):(Total: 2m39s, non-child: 2m23s, % non-child: 90.24%)
         - BuildPartitionTime: 24s782ms
         - BuildRows: 30.00M (30000000)
         - BuildRowsPartitioned: 30.00M (30000000)
         - BuildTime: 12s134ms

Regression was introduced between 74b45794d2a0f4a459f604ddbc4964685437b0ff and 35713197462670a62625b3b36c9af3f24339abc5