[CASSANDRA-18027] Use G1GC as default

• Type: Task
• Status: Resolved
• Priority: High
• Resolution: Fixed
• Fix Version/s: 4.1.1, 5.0-alpha1, 5.0
• Component/s: Local/Config
• Change Category: Operability
• Complexity: Normal
• Platform: All

Source Control Link

https://github.com/apache/cassandra/commit/7c86e18baf10b3cf6c8f06ee9f1e27d2e21acf78

Test and Documentation Plan

CI

• Assignee: Michael Semb Wever
• Reporter: Michael Semb Wever

Authors

Michael Semb Wever

Reviewers

Anthony Grasso, Brandon Williams, derek, Jeremiah Jordan, Jon Haddad, Josh McKenzie

• Created: 09/Nov/22 22:47
• Updated: 16/Nov/23 03:13
• Resolved: 20/Jan/23 12:19

Description

G1GC is well battle tested now, and the recommended configuration for most users. CMS can work well on smaller heaps but requires more tuning, initially and over time. G1GC just works. CMS was deprecated in JDK 9.

Patch at https://github.com/apache/cassandra/compare/trunk...thelastpickle:cassandra:mck/7486/trunk

Issue Links

• is duplicated by: CASSANDRA-16501 CMS is deprecated
• is related to: CASSANDRA-16501 CMS is deprecated
• is related to: CASSANDRA-18680 Java's Adaptive IHOP may allow removing server.options -XX:InitiatingHeapOccupancyPercent override
• is related to: CASSANDRA-18263 Update gc settings in build.xml
• relates to: CASSANDRA-7486 Migrate to G1GC by default