Per Eden Space Question?

James Louis-Foster

Hello All,

I was wondering what the per eden space meant for the jira application- today it was at 96 percent...

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This lists detailed information about the various parts of memory that the Java virtual machine uses to store its data. The information it presents is not a lot of use without a detailed understanding of this particular VM's garbage collector and how it is configured. This page will generally only be useful to Atlassian's support engineers. Specifically, high usage of a particular memory pool does not necessarily indicate any problem.
Code Cache	21 % Free (Used: 38 MB Total: 48 MB)
Par Eden Space	28 % Free (Used: 18 MB Total: 25 MB)
Par Survivor Space	33 % Free (Used: 2 MB Total: 3 MB)
CMS Old Gen	42 % Free (Used: 577 MB Total: 992 MB)
CMS Perm Gen	50 % Free (Used: 128 MB Total: 256 MB)

Andrew Frayling

Hi,

You shouldn't need to worry about Eden Space. When objects are created they are allocated memory in Eden Space and when Eden Space is full it triggers a minor garbage collection where objects are either destroyed or moved to a Survivor Space. This does a better job of explaining it that I can - http://middlewaremagic.com/weblogic/?tag=eden-space

Hope that helps?

Andrew.