From: Christoph Hellwig <hch@infradead.org>
To: Robin Holt <holt@sgi.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Large memory application exhuasts buffers during write.
Date: Fri, 26 Mar 2004 10:57:35 +0000 [thread overview]
Message-ID: <20040326105735.A4613@infradead.org> (raw)
In-Reply-To: <20040326012056.GB19152@lnx-holt>; from holt@sgi.com on Thu, Mar 25, 2004 at 07:20:56PM -0600
On Thu, Mar 25, 2004 at 07:20:56PM -0600, Robin Holt wrote:
> This is a 2.4 based kernel with many of the redhat patches applied.
> Before the application is started, there is approx 350GB of memory
> free according to top. When the app starts, it mallocs a 300GB
> buffer, initializes it, does computations into it, and then starts
> to write it to a disk file.
>
> What we see happen is the first approx 30GBs gets written and then
> swap starts getting utilized. Once swap has been heavily utilized,
> the OOM killer kicks in and kills the job.
Buffered writes or O_DIRECT? I guess you're doing the former and
actually want the latter. Try preloading a tiny library stub that
adds O_DIRECT to open for the interesting fds.
next prev parent reply other threads:[~2004-03-26 10:57 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-26 1:20 Robin Holt
2004-03-26 10:47 ` Denis Vlasenko
2004-03-26 10:49 ` Robin Holt
2004-03-26 10:57 ` Christoph Hellwig [this message]
2004-03-26 14:09 ` John Stoffel
[not found] <5F0021EEA434D511BE7300D0B7B6AB530EE480BB@mail2.ggn.hcltech.com>
2004-03-26 11:16 ` Christoph Hellwig
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20040326105735.A4613@infradead.org \
--to=hch@infradead.org \
--cc=holt@sgi.com \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®