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Date:      Wed, 20 Feb 2002 01:46:43 -0800
From:      "Dreamtime.net Inc." <clients@dreamtime.net>
To:        "Terry Lambert" <tlambert2@mindspring.com>, "Vincent Janelle" <random@carnagecopia.com>
Cc:        <freebsd-smp@FreeBSD.ORG>
Subject:   RE: Systat and Ram
Message-ID:  <AMEMLPOHFFIAJKMDAFDLKEAODOAA.clients@dreamtime.net>
In-Reply-To: <3C736028.FBD0F093@mindspring.com>

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Actually, we need to run anywhere from 30 to 300 httpd processes, 20-25 megs
each. We want to know how can we decide if we need more RAM based on
'systat' output.

Sincerely,

Stephen

> -----Original Message-----
> From: Terry Lambert [mailto:tlambert2@mindspring.com]
> Sent: Wednesday, February 20, 2002 12:37 AM
> To: Vincent Janelle
> Cc: Dreamtime.net Inc.; freebsd-smp@FreeBSD.ORG
> Subject: Re: Systat and Ram
>
>
> Vincent Janelle wrote:
> > Then you need something other than x86, because intel platforms
> > only support 4GB (unless you're using PSE, but each process is
> > still only limited to 4GB).
> >
> > If you need more than this you need to research other platforms
> > such as alpha, sparc, sgi mips, itanium, etc which provide a
> > 64bit address space and systems with support for greater than 4GB.
>
> You mean PAE (Page Address Extension), not PSE (Page Size
> Extension).  The PSE is use to get 4M and other page sizes
> between 4M and 4K.
>
> Really, he ought to be reconsidering why he believes his
> application needs more than 4G of physical RAM, and whether
> he can achieve the same effect with a cluster.  If that's
> impossible, then and only then should he look at another
> architecture, IMO.
>
> -- Terry
>


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