Here is our situation, we originally launched zope with a small user base in mind and like most IT implementations it got away from us quickly and we have over 1000 users now. We are experiencing huge slowdowns and lots of complaints of performance. Let me outline our system: I have a load balancer that round robins incoming request to 3 zeo servers I have 1 zope server on the back en that severs the data, this is a large single processor machine with 4 gigs of ram Each zeo server is 2 gigs of ram, single processor 3.2 gighz The throughput doesn't appear to be the problem as ram/processors are. Short term I plan to change all zeo's to 4 gigs ram and add 3 additional servers. The Technologies we are using are Zope, Zeo, plone and so forth. Why are we having these large issues? I see sites with hundreds of thousands of users and they don't seem to have these issues? We plan to recode our site to get away from the Data.fs as soon as we can but that is a ways off yet. What am I doing wrong can anyone help?