We are thinking about using single socket ESX hosts instead of dual sockets to extend our current licensing further, and, also because we have seen that memory (not cpu) resources seems to be the greatest hog in our environment. We are running vSphere 4.1 with 6 dual socket ESX hosts with around 30 VMs on each. We have seen CPU usage way low so it seems like single core may be the way to go esp to save on licensing costs.
The single socket servers we are considering deploying would be these:
-HP DL360s with Quad-Core Intel® Xeon® Processor E5530 (2.40GHz, 8M Cache) and
-HP DL380s with Quad-Core Intel® Xeon® Processor X5550 (2.66GHz, 8M Cache)
Does anyone else have experience doing this? We've never tried this before. So I'm not sure if we are overlooking anything.