RE: Tracing sessions

The trace dies when the traced session dies.  I've never heard of a
trace being automatically restarted for a new session with the same SID
and serial# as an earlier trace, but I've never tested it and I suppose
it's possible.  On a related note, old trace files will be appended by
later traces/dumps for processes with the same PID.
 
I just found that in 10g, you can identify active traces by checking the
v$session.sql_trace value.  This column didn't exist in earlier
versions, but the information may have been there in one of the x$ table
columns that just wasn't exposed in v$session, or maybe in a different
v$ view, but if so I'm not aware of it.  In 10g, the v$session.sql_trace
value comes from x$ksuse.ksuseflg2, which doesn't exist in 9i.
 
Regards,
Brandon

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