What is recommended value for JVM young generation ratio on Jira


1 answer

I assume that your reason for asking the question is because you are experiencing some performance issues.

The optimal JVM settings differ for each install but it is worth reviewing the resources at https://confluence.atlassian.com/display/JIRAKB/Crashes+and+Performance+Issues+Troubleshooting as these will help you with troubleshooting your settings.

Hello Phill,

Our performances with JIRA are not really bad, but I want to know if  better settings can improve them. It seems to have read than Atlassian recommands to adjust XX:NewSize between 30% and 40% of Xmx.

In fact, why define 12Go for Xmx if only 5 is used ?



Hi Gilles, 

yes it does seem a little perverse at times the allocation of memory. 

I would look at the page <yourhost>/secure/admin/ViewMemoryInfo.jspa for any particular pain points. But be aware that a 100% usage is not always a bad thing.

If you have a monitoring tool in place it is a good idea to benchmark some changes so that you can see what your normal performance is and then what difference a small change makes to that performance. Typically you should capture this information over a reasonable (~1 week) period unless the performance degradation is very obvious.

Suggest an answer

Log in or Sign up to answer
Atlassian Community Anniversary

Happy Anniversary, Atlassian Community!

This community is celebrating its one-year anniversary and Atlassian co-founder Mike Cannon-Brookes has all the feels.

Read more
Community showcase
Julia Dillon
Posted Apr 17, 2018 in Jira

Tell us how your team runs on Jira!

Hey Atlassian Community! Today we are launching a bunch of customer stories about the amazing work teams, like Dropbox and Twilio, are doing with Jira. You can check out the stories here. The thi...

764 views 2 19
Join discussion

Atlassian User Groups

Connect with like-minded Atlassian users at free events near you!

Find a group

Connect with like-minded Atlassian users at free events near you!

Find my local user group

Unfortunately there are no AUG chapters near you at the moment.

Start an AUG

You're one step closer to meeting fellow Atlassian users at your local meet up. Learn more about AUGs

Groups near you