Re: DB Freeze

Hi,

Take HANGANALYZE dump, and upload it to iOraHangAnalyzer at http://www.ubTools.com/products/iorahanganalyzer/iorahanganalyzer.html.

regards...

"Rodrigues, Bryan" wrote:

> 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
> ______________________________________________________
> Rajendra Jamadagni MIS, ESPN Inc.
> Rajendra dot Jamadagni at ESPN dot com
> Any opinion expressed here is personal and doesn't reflect that of ESPN Inc.
>
> QOTD: Any clod can have facts, but having an opinion is an art!
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Rodrigues, Bryan
> INET: BRodrigues_at_elcom.com
>
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--
Danisment Gazi Unal
http://www.ubTools.com


-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Danisment Gazi Unal
  INET: dunal_at_ubTools.com

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