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JVM size and performance tuning Edited

firstly, can someone repost this article? it appears to have been deleted and is refered to from multiple sources:


secondly, we are finding that after a day or two using jira, the system grinds to a halt and needs to be restarted to get back functionality. I am looking into it, and i noticed that JVM is set extremely low in my no knowledge opinion:



Some items like meatspace are at 0%!!!!



EDIT: increasing to 2gb (reports as 1051mb used out of 1815 free) now has made the site MUCH faster! wow... ill continue to monitor






so i was going to change the JVM memory size, but i went to look at that and the document says that 768 should be fine with less than 5k issues. We have like 30 issues, so maybe it doesnt need to be changed as per this doc?


I am going to try boosting it anyways. The vm has like 8 gigs assigned to it so i think increasing to 2gb is not crazy. However the doc makes me think it could actually have negative performance impacts. Anyone got any thoughts on this? or what could be giving me performance issues after a few days running.


2 answers

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2 votes
Answer accepted

Check out this documentation on Jira sizing. 

As for personal experience, for an instance with ~50 projects and ~70k issues we've set JVM heap size to 6GB and are doing just fine.

Hi Ivan

What is the JVM heap size recommendation for ~ 629998 issues and ~350 projects.



1 vote
Answer accepted

We are using 8GB of memory for the JVM for at least a year, and only happy we upgraded the memory. The only thing to keep in mind is keep enough memory for the rest of the system, but Jira will not work worser because it has too much memory.

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