I know it sounds odd, but I've found that Win2008 has performance problems when it's IP address doesn't have a valid PTR record in DNS. For some reason Win2008 queries DNS for its own IP address, and if it doesn't get an answer or gets "not found" it keeps repeating the query. I first noticed this myself with TS -- the DNS server was getting 100 queries per second with several users logged in, all for the TS servers own IP address! Adding the PTR record in our master DNS (which wasn't running on the problem server) immediately stopped the repetitive queries.
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by: plimpiasPosted on 2008-09-16 at 22:59:16ID: 22495826
A good test would be to see if the same slowness happends when you log in locally, without using RDP. For each VMware server, do you have a dedicated nic?
I would take that teaming on unless you are have two switches and are using redudency, the less you have the better your server.