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How many guests should I be able to run?


Erik Harmon

Question

I've got a dual-cpu 2Ghz AMD server with 64 cores and 128GB of RAM. I've got to run a bunch of HVM guests on it with 448MB of RAM each, about 180 of them. If I start more than about 60 VMs, XenCenter loses connection with the server and it's impossible to reconnect (ssh still works, though, xe-restart-toolstack does not work.)

 

Is this a hardware limitation, a hypervisor limitation, or is my configuration somehow wrong? I've tried increasing RAM to the DOM0.

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