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#HPrerequisi... : "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... 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

On Mon, 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#HPrerequisi... : "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... 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.

I don't really see why Extension Manager would have impact on permgen (unless you have some jar extension installed that has to be loaded obviously). It's not creating classes or any other permgen related actions in the default distribution.

Thanks -Vincent _______________________________________________ devs mailing list [email protected] http://lists.xwiki.org/mailman/listinfo/devs

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