From: Rik van Riel <H.H.vanRiel@phys.uu.nl>
To: "Karl J. Runge" <runge@crl.com>
Cc: Linux MM <linux-mm@kvack.org>
Subject: Re: [PATCH] Patch to Memory Subsystem ... (Needed?)
Date: Thu, 12 Nov 1998 09:48:26 +0100 (CET) [thread overview]
Message-ID: <Pine.LNX.3.96.981112093820.16355B-100000@mirkwood.dummy.home> (raw)
In-Reply-To: <m0zdmYp-001hXmC@haystack.BOGUS_NET>
On Wed, 11 Nov 1998, Karl J. Runge wrote:
> Forgive my intrusion, I have been using Linux for about 5 years, and
> am a decent C programmer, but certainly not a kernel hacker
> (however, at least I am not afraid to at _look_ at the kernel code).
I guess that qualifies you as someone to pay decent
attention to :)
[SNIP dual ppro/64M 128M swap half full is sluggish]
> Is this inescapable because I am that far into swap?
I don't know how much swap I/O is going on, but it certainly
shouldn't be as bad as you describe.
I know my 72MB machine feels great when GIMP is 120 MB
in swap and paging a lot (not thashing though).
OTOH, if the working set of your machine is larger than
the amount of physical memory you have, I guess the
machine will be thrashing...
> I am looking to buy more RAM, but I still feel something is not
> right. I have used kernels 2.0.35, 2.1.88, 2.1.112, and now
> 2.1.127. Perhaps it was better in 2.0.x but I cannot be sure (that
> was some time ago). I would be willing to experiment with swap
> parameters my setup, perhaps via some sysctl interface to kswapd? Is
> there such a beast?
There is documentation in Documentation/sysctl/, but
it is currently out of date because Linus is ignoring
the patch I sent him.
> I have noticed Solaris recently added something that distinguishes
> between file I/O and system I/O at:
>
> http://www.sun.com/sun-on-net/performance/priority_paging.html
I'll check it out.
cheers,
Rik -- slowly getting used to dvorak kbd layout...
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parent reply other threads:[~1998-11-12 10:02 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
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