Stephen John Smoogen wrote: > On Tue, Dec 30, 2008 at 10:52 PM, Chris Adams > <[email protected]> wrote: > >> I am running RedHat 5 on a 32 bit system with 2 GB RAM . I have verified >> that the hardware supports at least 4 GB RAM. I added an additional 2 GB >> ram. However, issuing the various command to show memory available, it would >> only show ~2.5 GB. >> >> So, reading about the PAE kernel, I installed it via RPM and after >> rebooting, verified that the /etc/grub.conf file shows the PAE kernel first >> and the Default=0. When I run 'cat /proc/meminfo' and 'free -om', it still >> reports 2.5 GB. >> >> Can someone explain what is going on and what I should do, other than >> upgrading to a 64 bit system? I have done this same update on an identical >> server running CentOS 5 and it recognizes the 4 GB. >> > > Well the first thing is to make sure the servers are identical... make > sure the BIOS version and BIOS settings are exactly the same. I had a > set of boxes where the BIOS's were identical but for some reason the > shipped settings were different and RAM would not show up. After that, > what does uname -a show. > > > I would also try adding the mem=4000M parameter to the kernel boot params.
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