[CentOS] Adding RAM

Rainer Duffner rainer at ultra-secure.de
Sat Dec 6 00:18:21 UTC 2008


Am 06.12.2008 um 01:02 schrieb Ignacio Vazquez-Abrams:

> On Fri, 2008-12-05 at 23:57 +0000, Michael Holmes wrote:
>> 2008/12/5 Matt <lm7812 at gmail.com>:
>>> I have a server running Centos 4.7 32bit.  Will moving from 4Gig of
>>> RAM to 8Gig do any good?  Since its 32bit I assume it will only be
>>> able to address the first 4Gig not?
>> As long as you are using a SMP kernel you can use up to 64GB of RAM
>> (though each proccess can only address 4GB of this). So if you can
>> find any trace of  "SMP" in the uname (grep is your friend) then it
>> should work fine.
>
> PAE, not SMP.
>


He should be able to replace the kernel via rpm -e and rpm -i

That said, I doubt he'll actually see a benefit.
PAE is slow.
If you want to see a real performance-gain, install 5.2 x86-64.



cheers,
Rainer


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