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тАО07-26-2007 08:56 PM
тАО07-26-2007 08:56 PM
We suspect buffer cache (flushing of data to disk) and/or paging to be the culprit, but aren't able to pinpoint them. The reason being that system being "dead", we are unable to collect any data for that period.
Any help would be appreciated.
Solved! Go to Solution.
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тАО07-27-2007 03:14 AM
тАО07-27-2007 03:14 AM
SolutionAs the server is dead, if you have configured netdump, try checking if netdump was generated or not in /var/crash of netdump server.
Else
Try SYSRQ facility:
Below is the procedure to configure sysrq:
http://kbase.redhat.com/faq/FAQ_80_5559.shtm
If you would like to know how to configure netdump client and netdump server, plesse check the below link:
http://kbase.redhat.com/faq/FAQ_43_2467.shtm
http://www.docs.hp.com/en/5991-7402/ch07s09.html
HOPE THIS HELPS.. :o)
Regards,
SaC
PS: Best way to thank in this forum is to assign points
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тАО07-27-2007 04:19 AM
тАО07-27-2007 04:19 AM
Re: System blackout [no response]
try dmesg
see if there are any hardware failures or like.
Could it also be a network failure?
kind regards
yogeeraj
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тАО07-27-2007 01:45 PM
тАО07-27-2007 01:45 PM
Re: System blackout [no response]
anything on dmesg or messages(something reported few hours back...)
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тАО07-30-2007 03:58 PM
тАО07-30-2007 03:58 PM
Re: System blackout [no response]
We need to investiate more on why CPU ended up spending cycles in kernel mode, or was it all in user-mode itself.
Thanks for sharing your knowledge. We will definitely investigate more on sysrq and its possible usage in our environment.