| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | "Bossart, Nathan" <bossartn(at)amazon(dot)com> |
| Cc: | Michael Paquier <michael(at)paquier(dot)xyz>, Fujii Masao <masao(dot)fujii(at)oss(dot)nttdata(dot)com>, Justin Pryzby <pryzby(at)telsasoft(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, Magnus Hagander <magnus(at)hagander(dot)net>, Mark Dilger <mark(dot)dilger(at)enterprisedb(dot)com>, Don Seiler <don(at)seiler(dot)us>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Estimating HugePages Requirements? |
| Date: | 2021-09-10 20:01:23 |
| Message-ID: | CA+TgmobbjVEzWco+4Wq79DWyqDqknx123dN-zLABN2Nb-tc-4Q@mail.gmail.com |
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| Lists: | pgsql-admin pgsql-hackers |
On Thu, Sep 9, 2021 at 5:53 PM Bossart, Nathan <bossartn(at)amazon(dot)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
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