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From: Dmitry Antipov <dmantipov@yandex.ru>
To: Eli Zaretskii <eliz@gnu.org>
Cc: emacs-devel@gnu.org
Subject: Re: warn-maybe-out-of-memory
Date: Fri, 11 Jul 2014 13:43:31 +0400	[thread overview]
Message-ID: <53BFB1C3.9020202@yandex.ru> (raw)
In-Reply-To: <8361j4b744.fsf@gnu.org>

On 07/11/2014 01:02 PM, Eli Zaretskii wrote:

> I mean the cases where the file size is borderline, near the available
> memory, but slightly less than that.

We may warn if file size reaches or exceeds, say, 90% of available memory.

> Then how does this feature make sense?  It is, according to you,
> unpredictable and uncontrollable.

This depends on OS and VM pressure. For example, on GNU/Linux if I have
just slightly above 8G free:

$ free
              total       used       free     shared    buffers     cached
Mem:      16127204    7762072    8365132      68248      84396    6401276
-/+ buffers/cache:    1276400   14850804

and asks for 10G, the kernel may shrink page cache by 2G and satisfy
10G mmap request, thus fooling the logic I'm using to issue the warning.
But under some circumstances, this may be not so; in short, I think that
we need to support more OSes and gather more feedback from users.

Dmitry




  reply	other threads:[~2014-07-11  9:43 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-07-10 18:23 warn-maybe-out-of-memory Eli Zaretskii
2014-07-10 18:47 ` warn-maybe-out-of-memory Eli Zaretskii
2014-07-11  4:42   ` warn-maybe-out-of-memory Dmitry Antipov
2014-07-11  6:50     ` warn-maybe-out-of-memory Eli Zaretskii
2014-07-11  8:43       ` warn-maybe-out-of-memory Dmitry Antipov
2014-07-11  9:02         ` warn-maybe-out-of-memory Eli Zaretskii
2014-07-11  9:43           ` Dmitry Antipov [this message]
2014-07-11 10:00             ` warn-maybe-out-of-memory Eli Zaretskii
2014-07-11 10:14               ` warn-maybe-out-of-memory Eli Zaretskii
2014-07-11 10:34               ` warn-maybe-out-of-memory Dmitry Antipov
2014-07-11 12:43                 ` warn-maybe-out-of-memory Eli Zaretskii
2014-07-11 13:46             ` warn-maybe-out-of-memory Stefan Monnier
2014-07-12 17:17               ` warn-maybe-out-of-memory Glenn Morris
2014-07-13  7:01                 ` warn-maybe-out-of-memory Dmitry Antipov
2014-07-13 23:00                   ` warn-maybe-out-of-memory Glenn Morris
2014-07-15  3:45                   ` warn-maybe-out-of-memory Stefan Monnier
2014-07-15  4:44                     ` warn-maybe-out-of-memory Dmitry Antipov
2014-07-17  3:59                       ` warn-maybe-out-of-memory Stefan Monnier
2014-07-11 13:28     ` warn-maybe-out-of-memory Drew Adams
  -- strict thread matches above, loose matches on Subject: below --
2014-07-10 18:22 warn-maybe-out-of-memory Eli Zaretskii

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