[CentOS] Memory recognition in 6.2

on 6/19/2012 3:37 PM Hugh E Cruickshank spake the following:
> Hi All:
> 
> I have an HP DL380G5 server which I am loading CentOS 6.2 on and it does
> not appear to recognize all of the RAM installed on the server. The BIOS
> is reporting 26GB however top is reporting:
> 
>   Mem:  15720140k total, 418988k used, 15301152k free,  30256k buffers
>   Swap: 17956856k total,      0k used, 17956856k free, 135536k cached 
> 
> and free is reporting:
> 
>                total   used     free shared buffers cached
>   Mem:      15720140 418848 15301292      0   30256 135536
>   -/+ buffers/cache: 253056 15467084
>   Swap:     17956856      0 17956856
> 
> I have tried adding the mem= parameter to the /boot/grub/grub.conf file
> as in:
> 
>   title CentOS (2.6.32-220.17.1.el6.i686)
>           root (hd0,0)
>           kernel /vmlinuz-2.6.32-220.17.1.el6.i686 ro [SNIP]
>           initrd /initramfs-2.6.32-220.17.1.el6.i686.img
>           mem=26624M
> 
> but this has not appeared to work.
> 
> Any suggestions would be gratefully appreciated.
> 
> TIA
> 
> Regards, Hugh
> 
It looks like you installed 32 bit OS... I don't think it sees over 16 gigs...