[CASSANDRA-12197] Integrate top threads command in nodetool

• Type: Improvement
• Status: Resolved
• Priority: Low
• Resolution: Fixed
• Fix Version/s: 4.0-alpha3, 4.0
• Component/s: Tool/nodetool
• Labels: pull-request-available

Source Control Link

https://github.com/apache/cassandra/commit/82dc72088f85c7ed7ac7b74ae62cf2b751c8bb64

Test and Documentation Plan

https://github.com/ekaterinadimitrova2/cassandra/pull/13

CI tests results attached as screenshots to the ticket

SJK (https://github.com/aragozin/jvm-tools) has a command called ttop that displays the top threads within the JVM, sorted either by CPU utilization or heap allocation rate. When diagnosing garbage collection or high cpu utilization, this is very helpful information. It would be great if users can get this directly with nodetool without having to download something else. SJK is Apache 2.0 licensed so it might be possible leverage its code.

• Assignee: Ekaterina Dimitrova Assign to me
• Reporter: J.B. Langston

Authors

Ekaterina Dimitrova

Reviewers

Brandon Williams

• Created: 13/Jul/16 19:49
• Updated: 29/Oct/20 11:53
• Resolved: 10/Jan/20 17:45

Description

SJK (https://github.com/aragozin/jvm-tools) has a command called ttop that displays the top threads within the JVM, sorted either by CPU utilization or heap allocation rate. When diagnosing garbage collection or high cpu utilization, this is very helpful information. It would be great if users can get this directly with nodetool without having to download something else. SJK is Apache 2.0 licensed so it might be possible leverage its code.

Issue Links

• causes: CASSANDRA-16234 Update NetBeans project file for dependency changes since 11th Feb 2020
• links to: GitHub Pull Request #55