![]() ![]() KVM's maturity isn't quite up to Xen (or VMware) at this point but I see no reason to think that it would be noticeably worse than them for the example you describe.įor specific use cases though the overall\aggregate "performance" of a virtual environment can exceed bare metal \ discrete servers. For 64 bit Server operating systems running on hardware that supports the most current cpu hardware virtualization extensions I would expect all Type 1 hypervisors to be heading for that 1% overhead number. That is pretty much consistent in my experience for modern Guest OS's running under VMware ESX\ESXi, Microsoft Hyper-V and Xen where the underlying hardware has been appropriately designed. The typical experience for a general purpose server workload on a bare metal\Type 1 Hypervisor is around 1-5% of CPU overhead and 5-10% Memory overhead, with some additional overhead that varies depending on overall IO load. ![]()
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