[IMPALA-8757] Extend slot based admission to default executor group

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: Impala 3.3.0
• Component/s: Backend
• Labels: admission-control compatibility scalability
• Epic Link: Multithreading upgrade path for large clusters
• Epic Color: ghx-label-4
• Assignee: Vihang Karajgaonkar
• Reporter: Lars Volker
• Created: 12/Jul/19 20:05
• Updated: 24/Feb/21 23:18

Description

IMPALA-8484 adds support for multiple executor groups and uses a slot-based mechanism to admit queries to executors. In order to keep the existing behavior stable, this logic is not applied to the default executor group.

This Jira tracks work on doing that. We have to be careful not to break the existing behavior, and if we do, hold the change back until the next compatibility-breaking release.

Issue Links

• is related to: IMPALA-8998 Admission control accounting for mt_dop