VMware vSphere vCenter Server 4.0 - Manual (Page 79)

Then, you want this virtual machine to run only on node 1.
1
In the vSphere Client inventory panel, select the virtual machine and select Edit Settings.
2 Select Options and click Advanced.
3 Click the Configuration Parameters button.
4 In the vSphere Client, set memory affinity for the NUMA node to 1.
Completing these two tasks ensures that the virtual machine runs only on NUMA node 1 and, when possible,
allocates memory from the same node.
Chapter 8 Using NUMA Systems with ESX/ESXi
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