[nSLUG] Memory question

Dop Ganger nslug at fop.ns.ca
Thu Nov 4 19:30:03 AST 2004

On Thu, 4 Nov 2004, Crawford, Andrew (IT) wrote:

> pi119c1n1:~> uname -a
> Linux pi119c1n1 2.4.21-15.9.ELhugemem #1 SMP Thu Jun 10 03:55:32 EDT 2004 i686 i686 i386 GNU/Linux
> pi119c1n1:~> free
>              total       used       free     shared    buffers     cached
> Mem:       8258560    8086520     172040          0     297588    7219104
> -/+ buffers/cache:     569828    7688732
> Swap:      4144760          0    4144760
> Nice toys :) Can't take it home sadly.

Ah. 8 gig? There's a bunch of memory used for tracking highmem, if I
recall correctly. I think if you upgrade to 2.6 you have the option using
PAE which won't waste so much memory - with 2.4 there was only the option
to use 4G which had (and I'm a bit hazy on the details) a 3G/1G split
using paging, I think, which used a certain amount of memory keeping track
of the paging - that might be where you're losing memory. I don't know if
RHEL backported the PAE stuff or not.

Cheers... Dop.


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