Re: Estimating HugePages Requirements?

On Thu, Sep 9, 2021 at 5:53 PM Bossart, Nathan <bossartn@amazon.com> wrote:
> For 0001, the biggest thing on my mind at the moment is the name of
> the GUC.  "huge_pages_required" feels kind of ambiguous.  From the
> name alone, it could mean either "the number of huge pages required"
> or "huge pages are required for the server to run." Also, the number
> of huge pages required is not actually required if you don't want to
> run the server with huge pages.

+1 to all of that.

> I think it might be clearer to
> somehow indicate that the value is essentially the size of the main
> shared memory area in terms of the huge page size, but I'm not sure
> how to do that concisely.  Perhaps it is enough to just make sure the
> description of "huge_pages_required" is detailed enough.

shared_memory_size_in_huge_pages? It's kinda long, but a long name
that you can understand without reading the docs is better than a
short one where you can't.

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