From: | Andrew Kerber <andrew(dot)kerber(at)gmail(dot)com> |
---|---|
To: | piotrwlodarczyk89(at)gmail(dot)com |
Cc: | pgsql-docs(at)postgresql(dot)org |
Subject: | Re: 18.4.4. Linux huge pages |
Date: | 2016-10-22 16:32:18 |
Message-ID: | B46021E0-717C-4972-9B07-03C47BE44315@gmail.com |
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Thread: | |
Lists: | pgsql-docs |
In most versions of Linux, the default hugepage size is 2m. Other Unix versions may have different hugepage sizes, e.g. AIX, but Linux defaults to 2m
Sent from my iPad
> On Oct 21, 2016, at 11:43 AM, piotrwlodarczyk89(at)gmail(dot)com wrote:
>
> The following documentation comment has been logged on the website:
>
> Page: https://www.postgresql.org/docs/9.6/static/kernel-resources.html
> Description:
>
> Hi,
>
> it's a mistake in 18.4.4. Linux huge pages (also in 9.4 and 9.5
> documentation). Example how to count number f huge pages says:
>
> 6490428 / 2048 (PAGE_SIZE is 2MB in this case) are roughly 3169.154 huge
> pages, so you will need at least 3170 huge pages:
>
> It's very rare that PAGE_SIZE is 2MB. It's more common situation that the
> value is 4096KB. But it's not a problem.
>
> The VmPeak should by divded not by PAGE_SIZE but by Hugepagesize listed by
> cat /proc/meminfo | grep Hugepagesize.
>
>
>
> --
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