[BlueOnyx:00233] Re: 4gb on Blueonyx

[Rodrigo Ordonez Licona]

I tried using the zen Kernel, and now it reports more ram,

The server has 1 megabyte shared vga memory so I am still missing 174
Megabytes but I am happy now.

Mem:   4014320k total,   995260k used,  3019060k free,   212320k buffers
Swap:  4194296k total,        0k used,  4194296k free,   261032k cached

The server has been running for 24 hrs but we havent made any stress tests.

This seems to be a centos issue so maybe this is not the best place to ask
for help.

However after googling a bit I noticed that this seems to be a centos 5
problem,

There is a PAE Kernel and a Zen Kernel ,

PAE kernel should be used on server with more than 4 gb of Ram, 

Zen Kernel applies various patches that increase speed, stability, and
hardware support
(this is a transcript from http://www.tweako.com  not my own words )


To install the zen Kernel 
yum install kernel-xen.i686

And then make the grub / lilo conf change so it boots , you might just try
it if you select the kernel at boot time with your keyboard (up-down arrows)
if you have physical access to the server.


####
[root at maria init.d]# uname -a
Linux maria.xnet.com.mx 2.6.18-92.1.22.el5xen #1 SMP Tue Dec 16 13:08:49 EST
2008 i686 i686 i386 GNU/Linux
####

I saw strange messages at bootup ....  will run some apache, php and mysql
stress tests and see if the kernel actually works.
...For now cced, admserv and apache and sendmail keep running ok.

All suggestions are welcome and again sorry if this is not the good place to
report this.


Just thought a few on the list could find the info interesting.

Rodrigo O
Xnet




-----Original Message-----
From: blueonyx-bounces at blueonyx.it [mailto:blueonyx-bounces at blueonyx.it] On
Behalf Of Ken Marcus - Precision Web Hosting, Inc.
Sent: Miércoles, 14 de Enero de 2009 11:12
To: BlueOnyx General Mailing List
Subject: [BlueOnyx:00228] Re: 4gb on Blueonyx


>
>
>
> -----Original Message-----
> From: blueonyx-bounces at blueonyx.it 
> [mailto:blueonyx-bounces at blueonyx.it]
> On
> Behalf Of Ken Marcus - Precision Web Hosting, Inc.
> Sent: Wednesday, January 14, 2009 5:04 PM
> To: BlueOnyx General Mailing List
> Subject: [BlueOnyx:00224] Re: 4gb on Blueonyx
>
>
> ----- Original Message -----
> From: "Rodrigo Ordonez Licona" <rodrigo at xnet.com.mx>
> To: "'BlueOnyx General Mailing List'" <blueonyx at blueonyx.it>
> Sent: Wednesday, January 14, 2009 4:28 PM
> Subject: [BlueOnyx:00221] 4gb on Blueonyx
>
>
>> Hi, We have our test server laoded with 4gb of ram
>>
>> Shows this on the top Command,
>>
>> Memory total is way under 4gb 3.2gb if my calculations are correct.
>> Not sure if its related to the memory whole issue present on the x86 
>> architecture.
>> It there a bios setting that should be changed or a PAE switch on 
>> Centos
>> 5
>>
>> The chipset is Intel iCH75 (kind of old) Dual Core CPU
>>
>>
>> Mem:   3368508k total,   980308k used,  2388200k free,   372976k buffers
>> Swap:  4194296k total,        0k used,  4194296k free,   232872k cached
>>
>>
>> Any light on the issue would be greatly appreciated.
>>
>> Rodrigo O
>> Xnet
>>
>>
>
>
> Rodrigo
>
> Check using
> uname -a
> and see if you are running an smp kernel. If you are not, then it will 
> only show 3 gigs.
>
>
> E.g.
> Linux server   2.6.9-67.0.22.ELsmp #1 SMP Wed Jul 23 17:30:51 EDT 2008 
> i686
> i686 i386 GNU/Linux
>
>
>
> ----
> Ken Marcus
> Ecommerce Web Hosting by
> Precision Web Hosting, Inc.
> http://www.precisionweb.net
>
>



> Hey Ken. This is an issue that I had running BQ on a Dell 6650 with 4gig 
> of
> memory.
>
> What is the easy? Way to get it fired up with the smp kernel?
>
> Thanks...Doug



Doug on all my servers the smp kernel is there. SInce I use lilo then  all I

had to do was edit the  /etc/lilo.conf to set the SMP kernal as the default.
Then
lilo -v -v

I don't know what the process would be with Grub.

So the beginning of the file looks somethign like:

   UW PICO(tm) 4.10                                       File: 
/etc/lilo.conf

prompt
timeout=20
default=2.6.9-78.0.8.E1
boot=/dev/md6
map=/boot/map
install=/boot/boot.b
message=/boot/message
serial = 0,38400n8
linear

image=/boot/vmlinuz-2.6.9-78.0.8.ELsmp
        label=2.6.9-78.0.8.E1
        initrd=/boot/initrd-2.6.9-78.0.8.ELsmp.img
        read-only
        root=/dev/md1
        append="console=tty0 console=ttyS0,38400n8"
        vga=791





----
Ken Marcus
Ecommerce Web Hosting by
Precision Web Hosting, Inc.
http://www.precisionweb.net





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