Re: NUMA shared memory interleaving

On Wed, Apr 16, 2025 at 5:14 AM Jakub Wartak
<jakub.wartak@enterprisedb.com> wrote:
> Normal pgbench workloads tend to be not affected, as each backend
> tends to touch just a small partition of shm (thanks to BAS
> strategies). Some remaining questions are:
> 1. How to name this GUC (numa or numa_shm_interleave) ? I prefer the
> first option, as we could potentially in future add more optimizations
> behind that GUC.

I wonder whether the GUC needs to support interleaving between a
designated set of nodes rather than only being able to do all nodes.
For example, suppose someone is pinning the processes to a certain set
of NUMA nodes; perhaps then they wouldn't want to use memory from
other nodes.

--
Robert Haas
EDB: http://www.enterprisedb.com