[CASSANDRA-14902] Update the default for compaction_throughput_mb_per_sec

• Type: Task
• Status: Resolved
• Priority: Low
• Resolution: Fixed
• Fix Version/s: 4.0-beta1, 4.0
• Component/s: Local/Compaction, Local/Config

Source Control Link

https://github.com/apache/cassandra/commit/8599f93d9a6b198913228c05accceba9398ba17a

Test and Documentation Plan

Just updated the default value and comments so don't need much.

• Assignee: Jeremy Hanna
• Reporter: Jeremy Hanna

Authors

Jeremy Hanna

Reviewers

Michael Semb Wever

• Created: 19/Nov/18 22:02
• Updated: 01/Aug/22 21:28
• Resolved: 08/Jul/20 10:15

Description

compaction_throughput_mb_per_sec has been at 16 since probably 0.6 or 0.7 back when a lot of people had to deploy on spinning disks. It seems like it would make sense to update the default to something more reasonable - assuming a reasonably decent SSD and competing IO. One idea that could be bikeshedded to death could be to just default it to 64 - simply to avoid people from having to always change that any time they download a new version as well as avoid problems with new users thinking that the defaults are sane.

Issue Links

• is a parent of: CASSANDRA-17790 compaction_thoughput default value is different in cassandra.yaml and the Config class