memory limits to es3, u4

[Rick Stevens]

On Fri, 2006-06-09 at 15:26 -0500, Bob McClure Jr wrote:
> On Fri, Jun 09, 2006 at 01:07:18PM -0700, Ron McKeever wrote:
> > This might help:
> 
> Here is the URL pasted back together.  (#$%&#$ MS Lookout)
> 
> > http://www.redhat.com/docs/manuals/enterprise/RHEL-3-Manual/sysadmin-guide/ch-kernel.html
> > 
> >  
> > 
> > Ron
> 
> Also an upgrade to RHES v4 would be a good idea.  You get the 2.6.xx
> kernel.  I'm administering a couple of 2x2 Opteron boxes and it sees
> all four CPUs.

Remember that RHES, by default, maxes out at 2 CPUs (an apparent 4 if
you have hyperthreading) and 4 GB RAM.  This is one of the differences
between it and RHAS (up to 16 CPUs and 64GB RAM).

You can rebuild the kernel and up the limits by tweaking the config
files or possibly install the "bigmem" kernel.  I'm not sure if that
would affect your support (probably would).

> 
> > -----Original Message-----
> > From: redhat-install-list-bounces at redhat.com
> > [mailto:redhat-install-list-bounces at redhat.com] On Behalf Of chuck lawrence
> > Sent: Friday, June 09, 2006 10:59 AM
> > To: redhat-install-list at redhat.com
> > Subject: memory limits to es3, u4
> > 
> >  
> > 
> > greetings,
> > 
> >  
> > 
> > I've just built my third dual-processor dual-core opteron server.  for 
> > 
> > application reasons, I'm using RHES 3.0, U4.  RHES only supports 2 
> > 
> > processors, and this looks like 4.  but that's not my concern, necessarily.
> > 
> >  
> > 
> > I bought the server w/8gb ram, but the os only sees 3gb.  the bios sees 
> > 
> > it all, and it tests ok, but top and /proc/meminfo both say 3gb.  kernel 
> > 
> > is  2.4.21-27.ELsmp
> > 
> >  
> > 
> > is this a known issue, or is it just me?  do I need to update something?
> > 
> >  
> > 
> > p.s. I stumbled across a suggestion to add "mem=8000M" to grub.conf, but 
> > 
> > that hasn't helped.
> > 
> >  
> > 
> > adv(thanks)ance
> > 
> >  
> > 
> > -- 
> > 
> >  
> > 
> >   * ------------------- * ----------------------------*
> > 
> >   | charles e. lawrence | lawrence berkeley nat'l lab |
> > 
> >   | celawrence at lbl.gov  | #1 cyclotron rd  ms 50a6134 |
> > 
> >   | (510) 486-4682      | berkeley  ca  94720         |
> > 
> >   * ------------------- * ----------------------------*
> > 
> >  
> > 
> >      "If the human body did patch management the way
> > 
> >       (companies do), we'd all be dead."
> > 
> >  
> > 
> >                 www-eng.lbl.gov/~lawrence
> 
> Cheers,
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- Rick Stevens, Senior Systems Engineer     rstevens at vitalstream.com -
- VitalStream, Inc.                       http://www.vitalstream.com -
-                                                                    -
-    I don't suffer from insanity...I enjoy every minute of it!      -
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