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Re: RAM question for everyone!



On Fri, Jan 23, 2009 at 11:55:20AM -0430, Patrick O'Callaghan wrote:
> On Fri, 2009-01-23 at 10:24 -0600, Michael Cronenworth wrote:
> > -------- Original Message --------
> > Subject: Re: RAM question for everyone!
> > From: Alan Evans <ame fedora gmail com>
> > To: Community assistance, encouragement, and advice for using Fedora. 
> > <fedora-list redhat com>
> > Date: 01/23/2009 10:19 AM
> > 
> > > 
> > > This question, along with other recent discussion about swap, leads me
> > > to ask a question in response: Why is everyone so concerned about how
> > > to get away without swap?
> > > 
> > > Hard drives are cheap. Why does your server with potentially 10GB
> > > (!!!) of RAM have a hard drive so small that you can't sacrifice a few
> > > GB for swap?
> > > 
> > > I'm really curious.
> > > 
> > 
> > SATA Hard drive speeds - 70 megs to 150 megs a second unless you're RAIDing
> > DDR2 RAM speeds - 6000 megs a second and up.
> > 
> > If performance is a key issue, which I'm sure it is, you don't want swap.
> 
> In which case the real question is not "how much swap do I need?" but
> "how much RAM do I need to avoid swapping?".

My philosophy on that question is: Figure the worst-case max amount
you'll ever need then double it. At least. If not triple.

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