[IMPALA-6852] Add a section to the query profile covering number of fragments instances and total bytes scanned per host

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Implemented
• Affects Version/s: Impala 2.13.0
• Fix Version/s: Impala 3.3.0
• Component/s: Backend
• Labels: ramp-up supportability
• Epic Link: SupportabilityRoadMap
• Epic Color: ghx-label-6
• Assignee: Alice Fan
• Reporter: Mostafa Mokhtar
• Created: 13/Apr/18 21:02
• Updated: 16/May/19 00:48
• Resolved: 25/Mar/19 20:17

Description

Root causing performance issues usually comes down to skew in terms of work done across hosts. Un-even assignment of fragments or bytes scanned per host is a common.
Making this information readily available in the query profile will help speedup RCA.

Proposal is to add two tables to the query profile that cover

• Number of fragments per host
• Number of bytes scanned per host

Issue Links

• is related to: IMPALA-7724 Improve Impala Profile User Experience