CPU Considerations

To improve performance for latency-sensitive applications running on guest operating systems, schedule all virtual machines on the same Non-Uniform Memory Access (NUMA) node. Allocate all virtual memory from the local physical memory attached to that NUMA node.

When you schedule processor affinity for vCPUs on a specific NUMA node, use the vSphere Client to set the processor affinity:

To change the VM settings for processor affinity:
1. In the vSphere Client, select Resources tab > Advanced CPU.
2. Select Scheduling Affinity.
To change the virtual machine settings for memory affinity:
1. In the vSphere Client, select Resources tab > Advanced Memory.
2. Select NUMA Memory Affinity.

Recommendations for Virtual CPUs
In a production environment, verify that the total virtual CPU resources for the virtual machines do not exceed the CPU capacity of the host machine. That is, the total number of CPUs for the virtual machine cannot exceed the CPU capacity of the physical machine.
CPU Scheduling
You may see improved performance if you ensure that the virtual machine remains scheduled when the vCPU is idle may improve performance.

Parent topic: Running Adaptive Server on VMware vSphere 5.0