Re: How to re-trace a session

If you are running a UNIX variant, then the Oracle server process which was writing to the trace file probably still had a "file handle" open on it. On some platforms, you can use the "fuser" command to verify this...

So, when you re-initiated tracing, it was still trying to use the existing file handle. If you performed "mv" on the file within the same file-system, then the newly-named file should have received the new output. If you "cp"d the file then deleted the original or performed "mv" across file-systems, then the file actually still exists (i.e. still occupies disk blocks) but the i-node has been blown away, so you cannot access the data...

• Original Message ----- To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com> Sent: Tuesday, October 08, 2002 12:03 PM

> Hello,
>
> I successfully traced a long running session by using dbms_system.set_ev
> procedure, and moved the trace file to somewhere else. However, when
> I used the same command to re-trace the same session, I can't see the
> trace file again. There was no error message. I tried to use oradebug
> and dbms_system.set_sql_trace_in_session to trace the same session. No
> matter what method I used, I still can't see the trace file. Then, I
> tried to trace other sessions using all available methods, but all
> failed. Even though there was no error message, I can't see trace files.
>
> Can someone tell me what is wrong and how can I re-enable the
> sql trace?
>
> Tom
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Xie, Tom
> INET: TXie_at_taylorpub.com
>
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Author: Tim Gorman
  INET: Tim_at_SageLogix.com

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