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Is your vNUMA working?

Is your VM experiencing performance issues? When accessing memory in a NUMA based machine the CPU can access local memory to the CPU or remote memory.  Local memory is always preferable.  I came across this the other day…If you have your CPU Hot add/remove enabled vNUMA will be disabled for the VM.  Applications such as SQL may cause numa thrashing if they are using large amounts of memory and are not aware of the underlying NUMA of the physical host.