On Mon, Jul 23, 2012 at 09:26:18AM +0200, jannik.laval wrote: > Dear pharoers, > > We are loading really big models in the Moose software analysis platform. > This generate a lot of small objects and with the biggest model, we approach > the limit of 2Gb of the VM. > > Is it possible for anyone who knows the VM to add extra memory space ? Going > to 4Gb or maybe 8Gb would be a great thing. >
It is possible to have an image of at least 7GB (I have done this on my PC with 8GB real memory). Currently this requires tracing the image to a 64-bit object format with SystemTracer, and running the image on an interpreter VM compiled for the 64-bit format. I expect that this will work for Moose in a Pharo image, although performance of the garbage collector is likely to become an issue as the memory grows with lots of smaller objects, and the 64-bit interpreter VM will be significantly slower than a 32-bit Cog VM. If you want to try this with one of your images, I'll try to give you some help. I believe that Eliot has longer term plans for 64-bit object formats, VMs, and improved garbage collectors. Dave
