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From: war <war@starband.net>
To: James A Sutherland <jas88@cam.ac.uk>, linux-kernel@vger.kernel.org
Subject: Re: Swap vs No Swap.
Date: Thu, 22 Nov 2001 12:56:07 -0500	[thread overview]
Message-ID: <3BFD3C37.7C5BCCC4@starband.net> (raw)
In-Reply-To: <3BFC5A9B.915B77DF@starband.net> <E166wSm-00063a-00@mauve.csi.cam.ac.uk> <3BFD2997.95F2B9EE@starband.net> <E166xr9-0000Qy-00@mauve.csi.cam.ac.uk>

This is incorrect.
SWAP is used on a [1GB ram/2GB swap system].

I talked to Rik about this.
He said generally SWAP is a good thing and increases performance.

However, in my case it does not.

Nov 22 12:18:41 <war> riel: For a single user system.
Nov 22 12:18:43 <ata> war: what are you trying to do ?
Nov 22 12:18:44 <riel>  war: it all depends on what you use the computer for
Nov 22 12:18:56 <riel>  war: that's a very important thing to specify ;)
Nov 22 12:18:57 <war> General X apps, staroffice/netscape/media
stuff(aviplay)/etc
Nov 22 12:19:06 <war> compiling apps once and awhile
Nov 22 12:19:13 <riel>  war: ok, in that case you omost likely don't need swap
Nov 22 12:19:32 <riel>  war: but you really _need_ to tell what you are using
the computer for before anybody can give a sensible answer ;)
Nov 22 12:19:43 <war> riel: thats what I thought too, yet people still say I do
even after I told them what I was using it for
Nov 22 12:19:52 <ata> learath: nope 1gb will still win just one app will loose
and die
Nov 22 12:19:54 <war> riel: I sent the list of my ps auxww (512 processes) and
I still had 350MB left over.
Nov 22 12:20:05 <riel>  war: yup, I saw that



James A Sutherland wrote:

> On Thursday 22 November 2001 4:36 pm, war wrote:
> > The bottom line here is:
> >
> > There is no need for swap if you have enough ram.
> > Using swap with more than enough ram does absolutley nothing for the
> > system, except by degrading the performance of it.
>
> If the system has so much RAM that EVERYTHING fits in RAM - programs, data
> and FS cache - then the swap won't be touched anyway, and makes no
> difference. This is rather unlikely on a PC; in practice, adding swap should
> always improve matters. (Of course, the VM isn't perfect yet...)
>
> James.
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/


  reply	other threads:[~2001-11-22 18:00 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-11-22  1:53 Swap vs No Swap 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
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 [this message]
2001-11-22 18:08             ` James A Sutherland
2001-11-23 22:05       ` Daniel Gryniewicz
  -- strict thread matches above, loose matches on Subject: below --
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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