From: Andrew Morton <akpm@digeo.com>
To: Maciej Soltysiak <solt@dns.toxicfilms.tv>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.5.65 interactivity
Date: Mon, 24 Mar 2003 10:59:36 -0800 [thread overview]
Message-ID: <20030324105936.559a03d1.akpm@digeo.com> (raw)
In-Reply-To: <Pine.LNX.4.51.0303241931360.11544@dns.toxicfilms.tv>
Maciej Soltysiak <solt@dns.toxicfilms.tv> wrote:
>
> > First thing we need to work out is whether it is a CPU scheduler thing
> > or if it is a VM/MM/block/fs latency problem.
> OK
It is a VM/MM/block/latency problem.
> > - How much memory do you have?
> 128 MB
Your machine is swapping and paging like crazy. Bits of your X server get
paged out to disk and take ages to come back because the heavy write streams
are starving reads from disk.
> > - Try setting /proc/sys/vm/swappiness to zero
> i will try.
>
> > - Try decreasing /proc/sys/vm/dirty_ratio to 15
> will try that too.
>
These things should help - possibly the defaults are wrong.
Also the anticipatory IO scheduler in -mm kernels might help reduce the disk
read latency.
prev parent reply other threads:[~2003-03-24 18:50 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-22 18:43 Maciej Soltysiak
2003-03-22 21:25 ` Andrew Morton
2003-03-24 18:36 ` Maciej Soltysiak
2003-03-24 18:59 ` Andrew Morton [this message]
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=20030324105936.559a03d1.akpm@digeo.com \
--to=akpm@digeo.com \
--cc=linux-kernel@vger.kernel.org \
--cc=solt@dns.toxicfilms.tv \
/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®