1.  sys用户给管理用户授权。
SQL> grant execute on sys.dbms_system to andy;


Grant succeeded.


2. 查询被跟踪用户的sid,serial#  
SQL> select sid,serial# from v$session where username=‘DBLINK‘;


       SID    SERIAL#
---------- ----------
31    7
3.  管理用户andy开始跟踪dblink用户
SQL> exec sys.dbms_system.set_sql_trace_in_session(31,7,true);


PL/SQL procedure successfully completed.


4.  dblink被跟踪用户执行测试语句。
SQL> select * from user_tables;


5.  跟踪结束
SQL> exec sys.dbms_system.set_sql_trace_in_session(31,7,false);


PL/SQL procedure successfully completed.


6.  dblink用户查询自己当前trace文件号
SQL>  select * from v$diag_info where name like ‘Default%‘;


   INST_ID NAME
---------- ----------------------------------------------------------------
VALUE
--------------------------------------------------------------------------------
1 Default Trace File
/home/oracle/app/diag/rdbms/orcl/orcl/trace/orcl_ora_3524.trc


7. 用tkprof工具生成查看文件
[oracle@11g ~]$ tkprof /home/oracle/app/diag/rdbms/orcl/orcl/trace/orcl_ora_3524.trc andy2.txt sys=no


TKPROF: Release 11.2.0.1.0 - Development on Mon Nov 17 16:48:38 2014


Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.


8.  查看跟踪记录
[oracle@11g ~]$ cat andy2.txt


TKPROF: Release 11.2.0.1.0 - Development on Mon Nov 17 16:48:38 2014


Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.


Trace file: /home/oracle/app/diag/rdbms/orcl/orcl/trace/orcl_ora_3524.trc
Sort options: default


********************************************************************************
count    = number of times OCI procedure was executed
cpu      = cpu time in seconds executing 
elapsed  = elapsed time in seconds executing
disk     = number of physical reads of buffers from disk
query    = number of buffers gotten for consistent read
current  = number of buffers gotten in current mode (usually for update)
rows     = number of rows processed by the fetch or execute call
********************************************************************************


SQL ID: dtbhjabjx3v1u
Plan Hash: 4102440123
select * 
from                       <--  #刚执行sql找到
 user_tables           




call     count       cpu    elapsed       disk      query    current        rows
------- ------  -------- ---------- ---------- ---------- ----------  ----------
Parse        1      0.09       0.10          0          0          0           0
Execute      1      0.00       0.00          0          0          0           0
Fetch        2      0.11       0.31        174       1390          0           1
------- ------  -------- ---------- ---------- ---------- ----------  ----------
total        4      0.21       0.41        174       1390          0           1
。。。。省略输出。
   


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利用sql_trace跟踪一个指定会话的操作