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Im setting up some fedora 5 machines to use for MPI calculations. When the machines boot up and come to the gdm greeter already 280 MB of memory has been allocated. I have turned off as many demons as I can, but found nothing on gdm or X. As these machines dont need X, or gdm, I would like to know how to turn these of (prefferaby in a nice way so that I can turn them on for debugging).
That did indeed turn of all gdm and X. However, it only saved me
about 10 MB - which means it now use about 270 MB BEFORE I DO ANYTHING...
What is going on - is there a way to avoid this ??
Could it be that >free does not really show real number ??
i didnt know how to explain this, but I found this to be good enough.
Quote:
Just to elaborate a bit, the Linux kernel is designed to use most of the
available RAM for buffers and cache. Thus, few systems will have very
large numbers in the "free" column on the "Mem:" line of "free" output.
Mostly those numbers will be high immediately after booting, then drop as
you use the disk. it's the "-/+ buffers/cache"
numbers that are better indicators of how much RAM is in use.
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