Quote:
Originally Posted by TreeDude
You should only need 1 CPU. Because of the load balancing that ESX does adding more than 1 CPU to a VM can decrease performance in many instances. It is generally better to have a cluster of VMs with 1 CPU than have 1 VM with multiple CPUs.
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Totally agree - too many people add CPU's to VMs for no good reason. If all your VM's have multiple VCPU's you have effectivly crippled your ESX server.
We always use 1 VCPU unless application requires 2. BES on 1 VCPU 2.5 GHZ AMD machine with 1 GB RAM runs great with 300 users. We run 15-20 VM's on our 32 GB 2xdual core AMD servers.
When you start BES it always hits the CPU hard until it settles down after about 5-10 minutes of syncing with Exchange. This is normal.