VMware vSphere

Hi

Can anyone explain what is the difference between the vsphere advance parameters “numa.autosize.vcpu.maxPerVirtualNode”  and “numa.vcpu.maxPerVirtualNode”

Thanks 

Frank has a deepdive post on his blog about NUMA and explains all the settings:

https://frankdenneman.nl/2016/08/22/numa-deep-dive-part-5-esxi-vmkernel-numa-constructs/

If I understand correctly then “numa.autosize.vcpu.maxPerVirtualNode” is configured based on the number of vCPUs a VM has. numa.vcpu.maxPerVirtualNode allows you to override it. At least that is how I interpreted the lengthy post.

Thank you very much, So if we add configuration parameter "“numa.vcpu.maxPerVirtualNode” we might remove the parameter “numa.autosize.vcpu.maxPerVirtualNode”  am I right?

I would leave it, it seems to me that it overrides it anyway.

Thank you, you are right,  I just tried it and below the output for before configuring ""numa.vcpu.maxPerVirtualNode" and after configuring. Just for your reference 

Before:

numactl --hardware

available: 1 nodes (0)

node 0 cpus: 0 1 2 3 4 5 6 7 8 9 10 11

node 0 size: 16891 MB

node 0 free: 7160 MB

node distances:

node   0

  0:  10

After:

numactl --hardware

available: 2 nodes (0-1)

node 0 cpus: 0 1 2 3 4 5 6 7 8 9

node 0 size: 14371 MB

node 0 free: 10072 MB

node 1 cpus: 10 11 12 13 14 15 16 17 18 19

node 1 size: 14613 MB

node 1 free: 9250 MB

node distances:

node   0   1

  0:  10  20

  1:  20  10