Hi I have been running xwiki on a hosting server with 128Mb private JVM for a few weeks with no problems - but all of a sudden today i seem to be getting OutOfMemory errors whenever I try to run the app (i.e. go to the main page). Is there any links / advice for performance tuning - i was reading something about the attachment cache taking lots of memory (I would be happy to disable this cache). What would be the recommended memory for running xwiki? It all seems strange as i have been running it for 3 weeks with no probs, I have other hibernate apps but they are running fine. reagrds, rob.