An administrator is troubleshooting a performance problem with a virtual machine (VM). The VM and ESXi host configuration is as follows: -The application which runs within the virtual machine is highl

Setting numa.vcpu.preferHT=TRUE in the virtual machine's advanced parameters instructs the vSphere NUMA scheduler to prefer placing the VM's vCPUs on Hyper-Threading sibling logical CPUs that reside within the same physical socket. This prevents vCPUs from being distributed across both NUMA nodes, eliminating the remote memory accesses that increase latency for the memory-sensitive application.

Setting numa.vcpu.preferHT=FALSE is essentially the default behavior and disables HT-preference scheduling, meaning vCPUs remain free to spread across both NUMA nodes and cross-NUMA memory latency continues.

numa.PreferHT is not a recognized ESXi host-level configuration parameter; the correct advanced parameter is numa.vcpu.preferHT and it must be set in the individual VM's advanced settings, not in the host configuration file.

Setting numa.PreferHT=0 in the ESXi host configuration is not a valid mechanism for controlling per-VM NUMA HT scheduling, and even if it were interpreted, a value of 0 would disable the feature rather than enable it.