Since the author is running dual processors, they will need to account for NUMA domains. That is, half of the RAM is assigned to each CPU, and performance will

Since the author is running dual processors, they will need to account for NUMA domains. That is, half of the RAM is assigned to each CPU, and performance will suffer if a thread on CPU 0 is accessing memory belonging to CPU 1. numactl[0] can be used to bind a process to a specific NUMA node on bare metal, but a hypervisor can also set CPU/memory affinity for a given VM without fiddling about at the process level. https://linux.die.net/man/8/numactl https://linux.die.net/man/8/numactl