From: Bruce Momjian <bruce@momjian.us>
To: yanliang lei <msdnchina@163.com>
Cc: pgsql-docs@lists.postgresql.org
Subject: Re: huge_page_size parameter description in the pg 14 docs is not exact
Date: Wed, 20 Jul 2022 10:03:25 -0400
Message-ID: <YtgLLZ7AOuuXaBEZ@momjian.us> (raw)
In-Reply-To: <4310e627.5be8.1821be570d5.Coremail.msdnchina@163.com>
References: <4310e627.5be8.1821be570d5.Coremail.msdnchina@163.com>
On Wed, Jul 20, 2022 at 09:56:37PM +0800, yanliang lei wrote:
>
> https://www.postgresql.org/docs/15/runtime-config-resource.html#
> GUC-HUGE-PAGE-SIZE
>
>
> the following is from the above website:
>
> Some commonly available page sizes on modern 64 bit server architectures
> include:
>
> 2MB and 1GB (Intel and AMD), 16MB and 16GB (IBM POWER), and 64kB, 2MB, 32MB and
> 1GB (ARM). For more information about usage and support,
I think these are the sizes the CPUs support, no necessarily the ones
that the operating system supports.
> but after my test, I found that:
>
> in the RHEL7.9(kernel version 3.10.0-1160),when I set the non default huge page
> size for huge_page_size parameter ,PG14 can not start；
>
> in the RHEL8.5(kernel version 4.18.0-348),when I set the non default huge page
> size for huge_page_size parameter ,PG14 can start 。
The paragraph begins with:
Some commonly available page sizes on modern 64 bit server
architectures include:
which seems sufficient to suggest that all listed sizes might not be
supported on all operating systems, and this is only supported on Linux,
as documented.
--
Bruce Momjian <bruce@momjian.us> https://momjian.us
EDB https://enterprisedb.com
Indecision is a decision. Inaction is an action. Mark Batterson
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To: pgsql-docs@postgresql.org
Cc: bruce@momjian.us, msdnchina@163.com, pgsql-docs@lists.postgresql.org
Subject: Re: huge_page_size parameter description in the pg 14 docs is not exact
In-Reply-To: <YtgLLZ7AOuuXaBEZ@momjian.us>
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