Hello, Please be careful while reading system state dumps. Because, Oracle's system state dumping function doesn't make consistent read. I mean you can see a process which waiting for a lock while there is no holding process.
regards... "Gogala, Mladen" wrote: > Next time do sqlplus "/ as sysdba", then "oradebug setmypid", then > "oradebug dump systemstate 10" and then "oradebug tracefile_name" to find > out the name of the generated trace file. That is good enough for oracle. > If your platform is 64 bit HP-UX 11.0, then you need an OS patch. Included > is the note about it from the mighty and all-knowing oracle: > Article-ID: <Note:73835.1> > Circulation: PUBLISHED (EXTERNAL) > Folder: server.DBA.Admin > Topic: Alerts > Title: ALERT:HP-UX: ORA-7445 and Core Dump Generating Oracle > Stack > Trace > Document-Type: ALERT > Impact: MEDIUM > Skill-Level: NOVICE > Updated-Date: 03-MAY-2001 06:19:51 > > ORA-7445 and Core Dump Generating Oracle Stack Trace > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > Versions Affected > ~~~~~~~~~~~~~~~~~ > Oracle 8.X (64 bit only) > > Platforms Affected > ~~~~~~~~~~~~~~~~~~ > HP-UX 11.00 (64 bit only) > > Description > ~~~~~~~~~~~ > Whenever an Oracle stack trace is required, the shadow process will core > dump. > The stack trace in the corresponding trace file will be incomplete. > > Likelihood of Occurrence > ~~~~~~~~~~~~~~~~~~~~~~~~ > Every time an Oracle stack trace is required. Some examples are: > 1. an event has been set, and a stack trace is required in the trace file > > 2. some Oracle error requires a stack trace to be generated > > Possible Symptoms > ~~~~~~~~~~~~~~~~~ > The alert.log will show something like: > ORA-07445: exception encountered: core dump [11] [4286564440] [240] [0] > [] [] > > The corresponding trace file will include the following in the stack: > _doprnt > _fprintf > U_get_previous_frame > skdstgframe > > Error from U_get_previous_frame_x is 1 > Stack is not Windable > Stack has no Unwind_descriptor > > > Workaround > ~~~~~~~~~~ > No workarounds available. > > Patches > ~~~~~~~ > This problem is fixed by a HP patch. The first patch to include the > fix is: > PHSS_16849: s700_800 11.0 LIBCL patch > > This patch will be superceeded; please contact HP Support for detailed > patch > information. > > Oracle must be relinked after applying this patch, as follows: > %cd $ORACLE_HOME/rdbms/lib > %make -f ins_rdbms.mk ioracle > The instance needs to be shutdown when relinking. > > References > ~~~~~~~~~~ > bug 939745 : ERRORSTACK EVENT CRASHES FOR 64 BIT ORACLE ON HPUX 11.0 > > Note 43507.1 : ALERT: HP-UX Patch Levels Advised > > ____________________________________________________________________________ > __ > Oracle WorldWide Customer > Support > > > > -----Original Message----- > > From: Jamadagni, Rajendra [mailto:[EMAIL PROTECTED]] > > Sent: Tuesday, May 21, 2002 4:00 PM > > To: Multiple recipients of list ORACLE-L > > Subject: DB Freeze > > > > > > 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: Gogala, Mladen > INET: [EMAIL PROTECTED] > > Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 > San Diego, California -- Public Internet access / Mailing Lists > -------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > the message BODY, include a line containing: UNSUB ORACLE-L > (or the name of mailing list you want to be removed from). You may > also send the HELP command for other information (like subscribing). -- Danisment Gazi Unal http://www.ubTools.com -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Danisment Gazi Unal INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
