On Dec 5, 2008, at 11:23 AM, Ajdin Brandic wrote:

> Sergiu
>
> Xwiki would not start with heap size more than 1.6gb, I've attempted
> this.
> I'll try the other option you've suggested although I do not know  
> how to
> load sql dump into HSQLDB? I've you have any suggestions please  
> advise.

One warning: You should definitely not use HSQLDB for anything more  
than demo purpose. It's not a production database.

Thanks
-Vincent

>
>
> I searched web for 2 days looking for answers to this question and  
> all I
> found was JAVA_OPTS and CATALINA_OPTS suggestions.  I have not seen  
> any
> ware your comment on "handling attachment consumes about 27 time the
> size of the attachment".  It was probably some ware out there but I
> missed it.
> Maybe you should include it on the Import/Export page
> http://platform.xwiki.org/xwiki/bin/view/AdminGuide/ImportExport
>
> Thank you for your response, at least I know where the issue is.
>
> Ajdin
>
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On  
> Behalf
> Of Sergiu Dumitriu
> Sent: 05 December 2008 10:14
> To: XWiki Users
> Subject: Re: [xwiki-users] Java Heap Space, Out of memory exception
>
> Ajdin Brandic wrote:
>> Hi All
>>
>> I am having a problem uploading a xar file.  I get "Java Heap Space,
>> Out of memory exception" (full message below).
>>
>> I've downloaded the latest version of XWiki for windows xp  
>> (beginner's
>
>> version with HSQLDB & Jetty).
>>
>> In my start_xwiki.bat I have set "set JAVA_OPTS=-Xmx1600m -Xms512m".
>> 1.6gb is the maximum as xwiki would not start if I go over this.
>>
>> I don't think I have CATALINA.bat any ware so I din not find where to
>> set CATALINA_OPTS.
>>
>> I have changed file upload size to 133MB by going to
>> http://localhost:8080/xwiki/bin/edit/XWiki/XWikiPreferences? 
>> editor=obj
>> ec t  and changing Maximum Upload Size:.
>>
>> The .xar file is 90MB downloaded as backup from
>> http://patternlanguagenetwork.myxwiki.org/xwiki/bin/view/Main/ 
>> WebHome.
>> I do not know what version this runs on since it is on one of the
>> xwiki farm things :-).
>>
>> I have Win XP with 3.5gb memory available.
>>
>> Has anyone had this error recently?
>>
>
> This is a major design flaw of the current attachment storage model.  
> As
> stated in a previous mail, handling attachment consumes about 27 time
> the size of the attachment, so 90M * 27 ~= 2.5G. This needs to be  
> fixed
> ASAP. In the meantime, you can either increase the heap size to more
> than 2.5G, or request an sql dump from the myxwiki farm admins.
>
> -- 
> Sergiu Dumitriu
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