Hi Eduardo,

Try running kernel-hugemem instead of the normal kernel, I recently 
had similar problems to you which were fixed by running 
kernel-hugemem.

I upgraded the RAM in a machine from 2gb to 4gb and it ran really 
slowly with the normal kernel, but fine with kernel-hugemem

yum install kernel-hugemem

rebboot and pick kernel-hugmem on boot.

Good luck,

Rhys


On Thu, 29 May 2008, Eduardo Bach wrote:

> Hello to all.
> First sorry my terrible english.
> Some time ago we buy a new server on which we have installed SL-45.
> The server has the following characteristics:
> Super Micro motherboard
> 2 cpus dualcore Intel Xeon 2GHz
> 4GB of ram, 250GB of disc.
> On that occasion the server had a LSI SATA RAID controller, with the raid with 
> two disks of 250GB. For some reason that we do not know that until today, the 
> disc access was very slow, at the point of the machine go getting increasingly 
> slow until freeze. This happened in a short time, a matter of minutes after 
> start the nfs server. The only thing I could find is that, looking at the top, 
> we getting all processors increased the wa nearly 100% with us less than 10% 
> in all processors. We remove the raid controller and made the raid via 
> software and the problem had apparently disappeared. Today, doing some 
> searches through files, commands such as du and find took too long, turning 
> the wa to stay near 80% in almost all processors, with the difference that 
> when I concluded the program, the system returned to normal.
> Please send me any suggestion that I continue to research.
> Thank you now.
>
> Eduardo Bach
>