From: James A Sutherland <jas88@cam.ac.uk>
To: war <war@starband.net>, linux-kernel@vger.kernel.org
Subject: Re: Swap vs No Swap.
Date: Thu, 22 Nov 2001 11:00:54 +0000 [thread overview]
Message-ID: <E166rbB-0005LC-00@mauve.csi.cam.ac.uk> (raw)
In-Reply-To: <3BFC5A9B.915B77DF@starband.net>
In-Reply-To: <3BFC5A9B.915B77DF@starband.net>
On Thursday 22 November 2001 1:53 am, war wrote:
> I do not understand something.
>
> How can having swap speed ANYTHING up?
By providing ADDITIONAL storage. Yes, it's slower than RAM - but it's faster
than not having the storage at all.
> RAM = 1000MB/s.
> DISK = 10MB/s
>
> Ram is generally 1000x faster than a hard disk.
>
> No swap = fastest possible solution.
BS. You don't use swap INSTEAD of RAM, but AS WELL AS. Moving less frequently
used data to swap allows you to put more frequently used data in RAM, which
DOES speed things up. (At least, it does if the VM system works properly :P)
By your logic, we should switch off the system RAM, too: after all, L2 cache
is much faster again, so using RAM can only slow things down?
James.
next prev parent reply other threads:[~2001-11-22 11:01 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-11-22 1:53 war
2001-11-22 2:23 ` Joel Jaeggli
2001-11-22 2:31 ` war
2001-11-22 2:58 ` Mark Hahn
2001-11-22 4:09 ` listmail
2001-11-22 5:24 ` H. Peter Anvin
2001-11-22 5:30 ` war
2001-11-22 5:32 ` H. Peter Anvin
2001-11-22 9:50 ` Christian Bornträger
2001-11-22 8:50 ` Rik van Riel
2001-11-22 11:00 ` James A Sutherland [this message]
2001-11-22 16:00 ` war
2001-11-22 16:08 ` James A Sutherland
2001-11-22 16:57 ` Rik van Riel
2001-11-22 18:56 ` François Cami
2001-11-22 18:58 ` James A Sutherland
2001-11-22 19:17 ` François Cami
2001-11-22 19:36 ` G . Sumner Hayes
2001-11-22 20:37 ` James A Sutherland
2001-11-23 6:30 ` Charles Marslett
2001-11-23 9:13 ` James A Sutherland
2001-11-23 16:46 ` Charles Marslett
2001-11-22 16:25 ` war
2001-11-22 16:37 ` Ryan Cumming
2001-11-22 17:39 ` James A Sutherland
2001-11-22 17:56 ` war
[not found] ` <01112211150302.00690@argo>
2001-11-22 16:01 ` war
2001-11-22 16:12 ` James A Sutherland
2001-11-22 16:36 ` war
2001-11-22 16:33 ` Bjorn Wesen
2001-11-22 17:37 ` Thomas S. Iversen
2001-11-22 21:18 ` Mike Galbraith
2001-11-22 17:41 ` James A Sutherland
2001-11-22 17:56 ` war
2001-11-22 18:08 ` James A Sutherland
2001-11-23 22:05 ` Daniel Gryniewicz
2001-11-22 16:11 Elgar, Jeremy
2001-11-22 16:22 ` Ryan Cumming
2001-11-22 16:22 ` Stephan von Krawczynski
2001-11-22 16:29 Elgar, Jeremy
[not found] <Pine.LNX.4.10.10111221006010.29736-100000@coffee.psychology.mcmaster.ca>
2001-11-22 16:34 ` war
2001-11-26 20:18 ` Kent Borg
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