Hello,

Have you try to mesure the disk latency from your vSphere Client? The VMware best practice are asking for a datastore latency under 30ms (Troubleshooting Storage Performance in vSphere – Part 1 – The Basics | VMware vSphere Blog - VMware Blogs).

As far as I know, you should use one proxy for about 15 VMs. In my case I deploy 12 proxies per GRID and it's ok, I never met latency problem.

What kind of SAN do you use?

Thanks for the Reply.  I have not measured yet.  Ill check out that link to see if its helpful.  We are using an HP XP24000 SAN