Recommended server specs for running Xen/Hypervisor/VPS

I'm just wondering what would be the recommended minimum specs of a host server running a small number of VPS instances through Xen, for example, mainly in terms of CPU and RAM. How much RAM could be allocated from the host server to a VPS, in percent?
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Julian MatzJoint ChairpersonAsked:
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arnoldConnect With a Mentor Commented:
How heavy email, web traffic might get?
Using a 2U two processor multi core with a large enough RAM could be enough.

Do you have available hardware to test, baseline your VPS use/load.
There are apache, mysql, email testing tools that can help.
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arnoldCommented:
How many VPS and what services/tasks/loads will they be required to carry?
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Julian MatzJoint ChairpersonAuthor Commented:
Maybe 4-6... It would be usual LAMP environment, plus mail, and possible cPanel. I'm thinking each VPS may host between 3 and 10 domains maybe.
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Julian MatzJoint ChairpersonAuthor Commented:
Very sorry for the delayed response. The project was abandoned, because of a partnership with an established cloud service provider, so I forgot to follow up here. Again, sorry for the delay. Your input is much appreciated, as always.
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