[CASSANDRA-12676] Message coalescing regression

• Type: Bug
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 3.11.0, 4.0-alpha1, 4.0
• Severity: Normal
• Impacts: Docs
• Assignee: Jeff Jirsa
• Reporter: T Jake Luciani

Authors

Jeff Jirsa

Reviewers

T Jake Luciani

• Created: 20/Sep/16 18:13
• Updated: 15/May/20 08:00
• Resolved: 03/Mar/17 05:31

Description

The default in 2.2+ was to enable TIMEHORIZON message coalescing. After reports of performance regressions after upgrading from 2.1 to 2.2/3.0 we have discovered the issue to be this default.

We need to re-test our assumptions on this feature but in the meantime we should default back to disabled.

Here is a performance run with and without message coalescing