CentOS - Jun 2017 - should NUMA be enabled?

Hi,

should NUMA be enabled in the BIOS of a server that has
two sockets but only a single CPU in one of the sockets?

 From what I?ve been reading, it is unclear to me if NUMA
should be enabled only on systems with multiple CPUs in
multiple sockets or if multiple cores of a single CPU in
a single socket benefit from NUMA being enabled, and if
memory access in general benefits from NUMA being enabled
(in some other ways) even when there is only a single
CPU in a single socket.

It seems clear that NUMA should be enabled an can be taken
advantage of when there are multiple CPUs in multiple sockets.

-----Original Message-----
From: CentOS [mailto:centos-bounces at centos.org] On Behalf Of hw
Sent: Friday, June 2, 2017 9:27 AM
To: CentOS mailing list <centos at centos.org>
Subject: [CentOS] should NUMA be enabled?
> should NUMA be enabled in the BIOS of a server that has
> two sockets but only a single CPU in one of the sockets?
> 
>  From what I?ve been reading, it is unclear to me if NUMA
> should be enabled only on systems with multiple CPUs in
> multiple sockets or if multiple cores of a single CPU in
> a single socket benefit from NUMA being enabled, and if
> memory access in general benefits from NUMA being enabled
> (in some other ways) even when there is only a single
> CPU in a single socket.
> 
> It seems clear that NUMA should be enabled an can be taken
> advantage of when there are multiple CPUs in multiple sockets.
It matters when you have more than one physical CPU. Read the
Wikipedia article describing it and might become more clear.