This is being discussed in the beta forum
http://www.gnutellaforums.com/showth...5375#post95375

The size varys with upload and download activity (but I'm noticing a unusual increases too. A 24 hr run as an ultrapeer showed vmem growing over 1.1 GB. The most I saw before was 1/2 a GB: new way of allocating/recording vmem sizes by Apple's latest updates, maybe?). Real memory wavered around 100 MB and reflected upload activity.