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NUMA can absolutely ping you in virtual servers, but without access to the hypervisor you'll never know why it's happening (JVMs straddling NUMA regions have ca
by rodgerd 13y ago
NUMA can absolutely ping you in virtual servers, but without access to the hypervisor you'll never know why it's happening (JVMs straddling NUMA regions have caused me pain in the past, when the guest was split across memory regions).
- dfox 13y agoThe point is that kernel inside VM guest knows nothing about NUMA, so it cannot do any kind of NUMA optimizations hence such optimizations cannot hurt performance as they do not happen at all.
- rodgerd 13y agoActually, KVM can allow you to create NUMA domains inside the guest, for better or worse.