[IMPALA-6598] Investigate memory requirement regression from scanner buffer pool change

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Not Applicable
• Fix Version/s: Impala 2.13.0, Impala 3.1.0
• Component/s: Backend
• Labels: resource-management
• Target Version: Impala 2.13.0
• Epic Color: ghx-label-9
• Assignee: Tim Armstrong
• Reporter: Tim Armstrong
• Created: 01/Mar/18 18:00
• Updated: 30/Apr/18 16:18
• Resolved: 30/Apr/18 16:18

Description

Figure out why memory requirements increased on some queries (e.g. IMPALA-6585) and do what we can to minimise the impact.

Issue Links

• is broken by: IMPALA-4835 HDFS scans should operate with a constrained number of I/O buffers
• is depended upon by: IMPALA-4835 HDFS scans should operate with a constrained number of I/O buffers