Running VMware View Client over ICA...

This is a bad idea.  I read about it awhile back and wanted to try it.  The idea of hosting the View Client on a XenApp server is very practical on networks that have an existing XenApp infrastucture.  However, the performance hit that I observed was significant when compared to simply using the View Client over the WAN.  This is probably because the graphics traffic is getting re-rendered two times; once by the View Client (PCoIP) and once by the Citirx Client (ICA).  The resulting slow down was workable, but not something I would want end-users to experience.

vCPU Sizing Whitepaper

This article is nice because it details the performance impacts of having 2 vCPU's assigned to one VM.  If a VM has to vCPU's, it has to wait for 2 pCPU's to be available before processing a request. 

http://www.vkernel.com/files/docs/white-papers/vcpu-sizing-considerations.pdf