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Home -> Community -> Mailing Lists -> Oracle-L -> RE: DB Freeze
One way is to do a system state dump level 10.
It is done either as svrmgrl or as sqlplus with sysdba privileges. You would use the command "alter sesssion set events 'immediate trace name systemstate level 10';" (if you do not have a large user dump file capacity you can alter your session to increase it). This needs to be done on all nodes of the cluster while the cluster is hanging. The dump may take up to 10 minutes to complete, but Oracle will require this for their investigation of the issue. The dump files will be found in the udump directory.
We are on 8.1.7.2.1 on HP-UX and we had a similar type of problem and Oracle had me do this when it happened. They were able to use the files in their investigation.
Good luck with the issue,
Bryan
-----Original Message-----
Sent: Tuesday, May 21, 2002 4:00 PM
To: Multiple recipients of list ORACLE-L
Last Friday, our 9012 database froze, I mean the only way we could get in was through sqlplus, no other tool would connect. We needed to bring the other side up as soon as possible so didn't spend any time running any queries to see what was the problem. The other side (of the cluster) wouldn't come up because it reported that some resource it needed was locked. So we had to shot the pmon process.
When analyzing the situation later, we found that Oracle didn't dump a single useful trace file, so contacting OWS was pretty much useless. OS logs were clean, no alarms raised there.
Has anyone encountered this situation that Oracle freezes and crashes without any trace files? How does one collect useful information in such cases? Are there any tools that we could use to gather at-lease some information before the DB crashes?
Thanks in advance for any ideas and tips. Raj
QOTD: Any clod can have facts, but having an opinion is an art!
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Please see the official ORACLE-L FAQ: http://www.orafaq.com
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Author: Rodrigues, Bryan
INET: BRodrigues_at_elcom.com
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