possible duplicate: Assessment & Planning Toolkit
I'm planning to rent a dedicated server from our provider that will host several services (SVN, LDAP, etc) each as a dedicated virtual machine. I guesstimate there will be between 5-10 servers, none of which should be under a particularly heavy load.
If I run this under Xen, how much memory/processing/disk should I ask for? Roughly? Any rules of thumb?