alter session set events 'immediate trace name savepoints level 1'

15:59:40 SQL> alter session set events 'immediate trace name savepoints level 1';
alter session set events 'immediate trace name savepoints level 1'
*
ERROR at line 1:
ORA-03113: end-of-file on communication channel


Elapsed: 00:00:00.01
15:59:50 SQL> 

  1  select
  2    u_dump.value   || '/'     ||
  3    db_name.value  || '_ora_' ||
  4    v$process.spid ||
  5    nvl2(v$process.traceid,  '_' || v$process.traceid, null )
  6    || '.trc'  "Trace File"
  7  from
  8               v$parameter u_dump
  9    cross join v$parameter db_name
 10    cross join v$process
 11          join v$session
 12            on v$process.addr = v$session.paddr
 13  where
 14   u_dump.name   = 'user_dump_dest' and
 15   db_name.name  = 'db_name'        and
 16*  v$session.audsid=1606078
17:47:05 SQL> /

Trace File
---------------------------------------------------------------------------
/oracle/admin/stag/udump/stag_ora_9684.trc

Elapsed: 00:00:00.07
17:47:11 SQL>