[IMPALA-10351] Enable mt_dop for DML

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: Impala 4.0.0
• Component/s: Frontend
• Labels: multithreading
• Epic Link: Impala Multi-threaded query execution
• Target Version: Impala 4.0.0
• Epic Color: ghx-label-5
• Assignee: Tim Armstrong
• Reporter: Tim Armstrong
• Created: 23/Nov/20 20:13
• Updated: 25/Nov/20 05:06
• Resolved: 25/Nov/20 05:06

Description

We don't have any pending issues for MT_DOP with DML and have sufficient functional testing, so I think we can go ahead and enable it. IMPALA-8125 and query hints give us a safety valve in case we overparallelize.