From owner-freebsd-questions  Fri Aug 18  7:51:52 2000
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Date: Fri, 18 Aug 2000 09:59:32 -0500
From: Charlie Root <jpaetzel@hutchtel.net>
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To: hosting@webcrossing.com
Cc: freebsd-questions@FreeBSD.ORG
Subject: Re: Max Memory question
References: <019b01c00801$13f53380$27430ace@mark8> <00081722475801.01673@sparky>
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Jeff Soule wrote:
> 
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> Out of the blue on Wed, 16 Aug 2000, Josh Paetzel Said:
> > ----- Original Message -----
> > From: "Josh Paetzel" <jpaetzel@hutchtel.net>
> > To: "Linh Pham" <lplist@closedsrc.org>; "Joel Bjork" <u98jobj@stud.hh.se>
> > Cc: "Jeff Soule" <hosting@webcrossing.com>; <freebsd-questions@FreeBSD.ORG>
> > Sent: Wednesday, August 16, 2000 11:01 PM
> > Subject: Re: Max Memory question
> >
> > >
> > > ----- Original Message -----
> > > From: "Linh Pham" <lplist@closedsrc.org>
> > > To: "Joel Bjork" <u98jobj@stud.hh.se>
> > > Cc: "Jeff Soule" <hosting@webcrossing.com>;
> > <freebsd-questions@FreeBSD.ORG>
> > > Sent: Wednesday, August 16, 2000 7:03 PM
> > > Subject: RE: Max Memory question
> > >
> > >
> > > > On Wed, 16 Aug 2000, Joel Bjork mumbled:
> > > >
> > > > > If I recall correctly the 4GB memory limit is due to the x86
> > structure.
> > > There
> > > > > is some info on this on the cdrom.com homepage but I can't find it.
> > > Basically
> > > > > it said that they were thinking of moving to Alpha architecture to be
> > > able to
> > > > > handle more requests.
> > > >
> > > > I thought that I heard somewhere that the Intel Xeon processors
> > > > supported 36-bit memory addressing... thus upping it's limit to 32GB.
> > > >
> > > > Could anyone confirm this?
> > > >
> > > > // Linh Pham
> > > > // http://closedsrc.org
> > > >
> > > >
> > >
> > > I was unable to confirm a 32GB limit, but I did find some info on the
> > Intel
> > > 450NX chipset which supports 4 P3 Xeon processors and 8GB of memory.
> > >
> > > Josh
> > >
> >
> > Sorry to reply to myself, but:
> > http://www.intel.com/design/pentiumii/xeon/prodbref/
> > states that the p2 xeon supports caching of 64GB of memory, and that intel's
> > Extended Server Memory Architecture "Breaks through the 4GB barrier."
> Cool Thanks!
> Sounds like even if I get a server that supports 8Gig I
> will only be able to use 4Gig with FreeBSD right?
> 
> /Jeff
>

That seems to be the final answer....unless you go to the alpha 4 gigs
is the max usable memory under FreeBSD.  (What would you use it all for,
anyways?  I know of some very busy websites that run on 1gig.) 

Josh

 
> >
> > Josh
> >
> > > >
> > > > To Unsubscribe: send mail to majordomo@FreeBSD.org
> > > > with "unsubscribe freebsd-questions" in the body of the message
> > > >
> > >
> - --
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Jeff Soule
> System Administrator: Web Crossing Inc.
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 
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> =AHNW
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> 
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