Hello to all.
I would like first to thanks Rhys and Troy who responded so promptly.
About the replacement of the kernel, I will do it, not now only because
I have not had a window for that.
About controller is deteriorating (if I do not committed any mistake), I
find it unlikely for the following. First because I not found, now or at
the time of server's installation, any error messages from disk. When
the LSI controller was on the server, I even tried to use the modules
from the manufacturer and the performance only got worse. So I resolved
boot the server with a gentoo livecd, just to experience, and all the
problems disappeared. The server had the performance expected and
everything else. Returning to the SL45, with the removal of the LSI
controller, we began to use the motherboard controller and do raid by
software. The value reached by wa in top was falores acceptable. Just
after a long time we have seen the problem appears again, and quite
intermittent. I suspect that the problem is becose some kernel
parameters, but in fact the options that I knew well already been exhausted.
Thanks again.
Eduardo Bach
Troy Dawson escreveu:
Hi Eduardo,
What Rhys said could be the problem, and it is worth a try.
But I would also check in /var/log/messages to see if there are any
disk related messages. Something about a controller or device timing
out.
It is usually a sign that a drive is starting to die and should be
replaced before it's completely dead. It is also occasionally the
sign that the controller is dying, but that doesn't happen as much as
a drive.
Troy
Rhys Morris wrote:
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
