[xwiki-dev] Possible memory leak ?

[Vincent Massol]

On Apr 5, 2007, at 7:50 PM, Youcef.Bey at imag.fr wrote:

> Hi Arnaud,
>
> I faced this problem before.
>
> The importation of huge data need the configuration of java  
> parameters of the
> heap. I was not able to import and create 300000 documents -  
> without object -
> until I changed the following parameters :
>
>  -Xms512m -Xmx521m  (you could add or change them in startup.bat in  
> windows or
> catalina.sh on linux).
>
> These parameters depends on your machine. Then you can increase (-- 
> >1024) or
> decrease them (1024).
>
> Hope this will solve your problem.

if anyone has the time, it would be nice to use a profile to  
understand why this is required...

Thanks
-Vincent

> Quoting Arnaud Thimel <thimel at codelutin.com>:
>
>> Hi all,
>>
>> For a particular project, I have a plugin that reads data from an
>> external database using some JDBC queries.
>> For each row of my JDBC ResultSet, the plugin creates an XWiki  
>> document,
>> the associated objects, and fill these objects.
>>
>> All is running fine except that I have around 50.000 objects to  
>> import :-D.
>> Then I get a Java Heap Space exception.
>>
>> I re-re-re-re-re-read my source code, I don't keep any reference  
>> to the
>> documents created.
>> Every 200 document creation, I do the following calls :
>>
>>                     context.getWiki().flushCache();
>>                     context.getWiki().getStore().cleanUp(context);
>>                     System.gc();
>>
>> Anyway, the amount of memory used doesn't go down after flushing  
>> the caches.
>> And I still get my Heap Space exception.
>>
>> Does anybody has an idea for me ?
>> Who thinks that I could be a XWiki memory leak ?
>>
>> Thanks,
>>
>> -- 
>> Arnaud Thimel
>> Société Code Lutin - http://www.codelutin.com
>>
>>
>>
>
>
>
>
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