How to check whether Jira is using swap file or not?

[zhen zhang]

This question is in reference to Atlassian Documentation: Garbage Collector Performance Issues

Dear support team,

I am investigating the GC and to see how to improve the JIRA performance. I want to know how to check if JIRA is using the swap file or not?  Could you please guide me on this? Thanks a lot!

Regards,

Zhen

[Jonas Andersson]

On linux:

use the command "free". The line "Swap:" and check column "used". The value should be a fraction of the total swap.

Also, install "Java melody" which gives great insight on different kinds of memories used in java, allowing you to graph it and see peeks in both CPU, memory, IO and http-sessions.