If attachments are the culprit, you should expect "OutOfMemory HeapSpace" errors. Permgen errors are indicative of not enough space for the classes which XWiki includes. Jython (used by the {{code}} macro) is known to cause permgen errors if permgen is not increased. I have myself encountered these errors and found that by increasing the permgen space to 128MB, I could make them go away permanently. Caleb outofmemory permgen errors On 10/12/2010 04:48 AM, Iola Hagen [ioh] wrote:

Hi we are having problems with outofmemory permgen errors, we make heavy use of the attachment feature in our xwiki installation and as the site has become more popular the memory errors have increased. I found the email below as a response to a similar question does anyone know if this has now been resolved.

We are running XWiki Enterprise 2.1.1.25889, on Windows Server 2008 Tomcat 6.0 with Java 1.6.0_18, the database is SQL server 2008.

Thanks for any help. Cheers Iola

Subject:

Re: [xwiki-users] Out of memory error<http://markmail.org/message/dctm6ag7j2ci6j42>

[cid:[email protected]]<http://markmail.org/message/dctm6ag7j2ci6j42>

From:

Vincent Massol ([email protected])

Date:

Jul 16, 2009 4:19:39 am

List:

org.xwiki.users

Hi there,

Unfortunately XWiki is still memory intensive when it comes to attachment manipulation. Thus the memory required depends on the size of the attachment you're uploading.

Seen the OOM error you're getting you'd need to increase the memory to make it work.

We really need to look into this and see how we can reduce the memory needs.

Thanks -Vincent

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