Virtual machines (VMs) require certain CPU core resources.
Four 2-vCPU HA guests typically require 8 threads, total.
Two 3-vCPU HA guest and one 2-VCPU HA guest typically require 8 threads, total.
Two 4-vCPU HA guests typically require 8 threads, total.
One 8-vCPU HA guest typically requires 8 threads, total.