Hi,

I'm going to increase the permgen to 192MB for now since we need XWiki to work 
and I've raised
http://jira.xwiki.org/browse/XWIKI-8853

Thanks
-Vincent

On Feb 25, 2013, at 3:01 PM, Vincent Massol <[email protected]> wrote:

> Hi devs,
> 
> Right now we recommend this on 
> http://platform.xwiki.org/xwiki/bin/view/AdminGuide/Installation#HPrerequisites
>  :
> "A minimum of 300MB of heap memory and 96MB of permGen. Recommended values 
> are above 512MB for the heap and 128MB for the permGen (-Xmx512m 
> -XX:MaxPermSize=128m)"
> 
> I've discovered on 
> http://ci.xwiki.org/job/xwiki-enterprise-test-extension/org.xwiki.enterprise$xwiki-enterprise-test-extension/1543/console
>  that we had an OOM and it seems to happen more and in more in our functional 
> tests on CI. Something we've done must have increased our permgen memory.
> 
> I've done some measurements with yourkit and here's what I found:
> * After XWiki is started and before any page is called we already use 64MB of 
> permgen
> * After calling the home page, the permgen used goes to 101MB
> * After calling a page using the code macro, the permgen goes to 132MB
> 
> So it seems that your default value of 96MB and recommended value of 128MB 
> are not enough…
> 
> BTW forcing garbage collection reduces from 132MB to 130MB (not much).
> 
> We need to either find what is taking all our permgen memory or if it's legit 
> increase our recommendations and the default value we use in 
> start_xwiki.sh/bat
> 
> Any idea?
> 
> My hunch tells me the Extension Manager could be the cause.
> 
> Thanks
> -Vincent

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