Where did the RAM go ..
m.watts at eris.qinetiq.com
Mon Jun 28 07:45:10 CDT 2010
On Mon, 2010-06-28 at 13:09 +0100, Nick Lunt wrote:
> Hi folks
> R900 running RHEL5.
> This weekend we moved up to 128GB RAM. However I'm confused with the
> outputs given.
> The server has 32 x 4096MB DIMM's, giving a total of 131072MB, which
> is 128GB.
> omreport shows the following:
> Total of Memory Array(s)
> Attributes : Total Installed Capacity
> Value : 131072 MB -- 128GB. Spot on, just what I expect
> Attributes : Total Installed Capacity Available to the OS
> Value : 128868 MB -- 125GB. So where did the rest go ?
> # free -m
> total used free shared
> buffers cached
> Mem: 128869 128245 623 0 659
> -/+ buffers/cache: 77885 50984
> Swap: 16383 92 16291
> So where did 3GB disappear to ?
> Many thanks,
Is this a 32bit PAE kernel, or x86-64 kernel?
I have recollections of 32bit kernels using the space below 4GB for PCI
Mark Watts BSc RHCE MBCS
Senior Systems Engineer, Managed Services Manpower
QinetiQ - Delivering customer-focused solutions
GPG Key: http://www.linux-corner.info/mwatts.gpg
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