[CentOS] 4gb ram shows as 3.3gb

[Nick]

Tim Verhoeven wrote:
> On 7/26/07, Nick <list at everywhereinternet.com> wrote:
>>
>> Running Centos 5 (32bit)... running a server with 4gb of RAM and it's
>> shows up as:
>>
>> [root at ubercore1 ~]# free
>>              total       used       free     shared    buffers     
>> cached
>> Mem:       3369544    2549668     819876          0      29008    
>> 2382360
>> -/+ buffers/cache:     138300    3231244
>> Swap:      6291448          0    6291448
>>
>> I know 4gb is the limit for a 32bit OS but i thought it would be able to
>> use all of it? Is there another kernel i was supposed to install?
>
> I've seen this before on laptops. This could be a limitation of the
> chipset itself. If that is the case, nothing can be done about it.
>
> Another option is that you try to boot with the PAE kernel. That
> kernel is made to go over the 4GB boundary on 32bit.
>
> Regards,
> Tim
>
>
yum install kernel-PAE

<reboot>

[root at ubercore1 ~]# uname -a
Linux ubercore1 2.6.18-8.1.8.el5PAE #1 SMP Tue Jul 10 07:50:36 EDT 2007 
i686 i686 i386 GNU/Linux
[root at ubercore1 ~]# free
             total       used       free     shared    buffers     cached
Mem:       4149852     251852    3898000          0      12500     141792
-/+ buffers/cache:      97560    4052292
Swap:      6291448          0    6291448

Fixed!

Is there anything i should know about the PAE kernel... like it self 
destructs after migrating 2000 users over to it? ;)