Yes, you need the kernel-pae.

32bit machines support only 4Gb, but if you have a processor with pae
support

# grep pae /proc/cpuinfo

you will be able to run >4Gb with a kernel-pae


#yum install kernel-PAE





--
========================================
Marcos Aurelio Rodrigues (DEiGrAtiA-33)
<deigratia33@(protected)>
CCNA, MCSO
Mirabilia laudo semprer, Dei
========================================

On Thu, Feb 14, 2008 at 6:44 AM, Johan Booysen <johan@(protected)>
wrote:

> I need a rather quick answer to this, so will ask the question while
> continuing googling:
>
> I've just upgraded the memory on an HP/Compaq DL380 G4 server running
> RHEL5, from 4GB to 6GB. But Red Hat only sees 4GB.
>
> A quick google tells me that I either need to install the kernel-PAE
> package, or the hugemem kernel. Is that correct? Yum shows me that
> kernel-PAE is available, but not kernel-hugemem.
>
> This server runs Oracle and is quite important to the business, so I
> can't just "have a go" and hope upgrading the kernel doesn't break
> anything.
>
> Any advice on this will be appreciated very much.
>
> grub.conf:
>
> title Red Hat Enterprise Linux Server (2.6.18-53.1.4.el5)
>     root (hd0,0)
>     kernel /vmlinuz-2.6.18-53.1.4.el5 ro root=/dev/VolGroup00/root
> rhgb quiet crashkernel=128M@(protected)>
>     initrd /initrd-2.6.18-53.1.4.el5.img
> title Red Hat Enterprise Linux Server (2.6.18-8.el5)
>     root (hd0,0)
>     kernel /vmlinuz-2.6.18-8.el5 ro root=/dev/VolGroup00/root rhgb
> quiet crashkernel=128M@(protected)>
>     initrd /initrd-2.6.18-8.el5.img
>
> Thanks.
> --
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