Mike,
free:
total used free shared buffers cached
Mem: 4009076 2400212 1608864 0 226400 1465612
-/+ buffers/cache: 708200 3300876
cat /proc/meminfo:
total: used: free: shared: buffers: cached:
Mem: 4105293824 2457948160 1647345664 0 231841792 1500786688
MemTotal: 4009076 kB
Trust me, it is only recognizing 4 GB. Which makes sense because you have
to recompile the kernel with high memory support in order to access > 4
GB.
My question, though, is if I can use the kernel high memory (> 4 GB)
option with AMD64 processors?
My understanding is that the feature that allows you to access 4 - 64 GB
is one that exists in Intel chips, but I do not know if it exists in AMD
chips. I could however, access all the RAM if I installed 64 bit Red
Hat because the natural limit RAM limit of a 64 bit chip utilized by a
64 bit OS is 2^64 bytes opposed to the limit on a 32 bit chip, 2^32 or 4
GB. The > 4 GB access is a hack, as far as I can tell.
Please correct me if I'm wrong, I am certainly not an expert on processor
or kernel architecture.
Thanks,
James
>
> We've got a quad Xeon (which is 32bit) with 10GB of RAM using RHEL2.1.
> Seems to be humming along just fine. What makes you think that it's not
> using all of your memory?
>
> Mike
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