Understanding NUMA

Андрей Михалевский 2,561 Reputation points

Hi. Can you explain when to turn on NUMA? How to diagnose the need for this technology ? Any recommendations ?

A Windows technology providing a hypervisor-based virtualization solution enabling customers to consolidate workloads onto a single server.
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  1. Ian Xue (Shanghai Wicresoft Co., Ltd.) 27,851 Reputation points Microsoft Vendor

    Hi Андрей Михалевский

    Do you mean turn on NUMA spanning in Hyper-V settings? NUMA spanning means Hyper-V will allocate memory from other remote physical NUMA nodes if the memory requirements for the virtual machine cannot be satisfied from a single node. Refer to this link for more details. https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2012-r2-and-2012/dn282282(v=ws.11)

    Best Regards,

    Ian Xue

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  1. Tobias Fink 0 Reputation points

    Hi, Numa nodes are essentially your CPU sockets. You can check how many nodes your host has in the task manager: User's image

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