> >> 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. It isn't slow; it does have a performance penalty. A 32bit box with 8GB serving many clients (as an IMAP server, file server, etc...) will be faster than a 32bit box with 3GB of RAM.