I am having the same issue on more than one host (Dell and HP), with more than one VM. Windows server 2019 seems much slower in Nutanix than for instance normal kvm in Debian (Proxmox) on the same hardware. I have been trying the same hardware and workload to compare Proxmox with Nutanix. In every respect, every test, Nutanix is faster, but not when running 2019. In some cases, other windows server version will run well (older the OS the better) Is this a driver issue ? Cpu features ? Any ideas about what to check ? In all cases I am running ce-2019.11.22-stable and VM’s have Nutanix-VirtIO-1.1.5-64bit
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