Hi,
I have a busy linux box (Centos 5.3) that stops responding at peak time and I'm trying to figure out why.
I'm trying to configure the kdump utility, and did the following:
$ yum install kexec-tools
$ chkconfig kdump on
$ reboot
$ sync
$ echo c > /proc/sysrq-trigger
At this point the system becomes unresponsive and after 15 minutes of waiting I cycled the power on the box.
I was following this tutorial:
http://www.novell.com/supp
I have some questions:
1. Should I keep trying to test kdump is working or assume it will work when the system crashes again?
2. My /var partition isn't big enough to hold an entire image of the physical memory, if that is what kdump does - what should I do?
3. Are there other crash inspection tools available? /var/log/messages rarely yields any useful information.
Thanks
This Question has been solved and asker verified All Experts Exchange premium technology solutions are available to subscription members.
Experts Exchange has been collecting answers to technology questions since 1996…3 million and counting! If you have a question, chances are we already have your answer.
If you can't find the exact answer you're looking for, ask our exclusive community of 50,000 experts. You’ll get a personalized answer from a trusted professional.
Thousands of free tech tips, tricks, how-to’s and tutorials are available in our peer reviewed articles section. See for yourself how smart our experts are, no login required.
Save solutions to your questions, answers you’ve discovered through searching plus helpful articles in your personal knowledgebase for easy future access.
Access the answers to your technology questions today.
30-day free trial. Register in 60 seconds.
Members of the expert community talk about why the experience at Experts Exchange is different than what you will find anywhere else.
Try it out and discover for yourself.
30-day free trial. Register in 60 seconds.
Join the community of experts here and help other tech pros by answering question in your area of expertise. You can earn FREE access to all Experts Exchange's premium features and resources.
What does the system do? The system might be overtaxed i.e. stuck in I/O wait, lack of memory resources, etc.
Do you have snmp polling. Do you have monitoring mechanism i.e. every X minutes get a snapshot of what is going on on the system?
How much memory does the system have, and how much swap does it have.
A system that becomes unresponsive might be a resource issue rather than the system crashing.
sorry to interrupt here after seeing this question i also tested/tried this url
http://kbase.redhat.com/fa
after running echo command system rebooted immediately pls see the attached pix doest this gives u same output?
i made an partition /dev/sda1
nd in /etc/kdump.conf
raw /dev/sda1
after restarting the system is up nd running .... iam not sure but i think it has worked??
kdump
It looks like it saved the kdump.
Also
> 2. My /var partition isn't big enough to hold an entire image of the physical memory, if that is what kdump does - what should I do?
Find enough space to save the dump. If You have another machine, You can configure netdump as well. The given url covers that as well.
Business Accounts
Answer for Membership
by: ravenplPosted on 2009-06-21 at 07:19:00ID: 24677445
I have successfully configured kdump using the following faq http://kbase.redhat.com/fa
Have You configured the kdump.conf file - after it's changed, the kdump service has to be restarted.
Have You configured memory for the crash (crashkernel=128M@16M)? It will not work without it.