学步园

--跟踪当前会话
oradebug setospid  --跟踪系统进程
oradebug setorapid  --跟踪ORACLE进程
oradebug unlimit  --取消trace文件大小限制    
oradebug tracefile_name  --查看trace文
oradebug session_event 10046 trace name context forever ,level 4--启用会话级10046
oradebug event 10046 trace name contextoff   --关闭10046事
oradebug event 10046 trace name context forever ,level 4
oradebug event 10046 trace name context off
alter session set events '10046 trace name context forever,level12';
--操作
alter session set events '10046 trace name context off';
--10g
select d.value || '/' || lower(rtrim(i.instance, chr(0))) ||'_ora_' ||
       p.spid || '.trc' trace_file_name
   from (select p.spid
          from sys.v$mystat m, sys.v$session s, sys.v$process p
         where m.statistic# = 1
           and s.sid = m.sid
           and p.addr = s.paddr) p,
       (select t.instance
          from sys.v$thread t, sys.v$parameter v
         where v.name = 'thread'
           and (v.value = 0 or t.thread# = to_number(v.value))) i,
        (select value from sys.v$parameter where name = 'user_dump_dest')d
--11g
select value from v$diag_info where name='Default TraceFile';