Oracle Trace文件生成及查看

1.获得当前trace文件生成路径
SQL> select tracefile from v$process where addr in (select paddr from v$session where sid in (select sid from v$mystat));

TRACEFILE
-------------------------------------------------------------------------------------------------------------------------------
f:\oracle\administrator\diag\rdbms\orcl\orcl\trace\orcl_ora_1160.trc

2.开启当前session的trace

SQL> alter session set sql_trace=true;
SQL> select count(*) from t1;

3.转换trc文件内容为可读的输出结果

C:\Documents and Settings\Administrator>tkprof f:\oracle\administrator\diag\rdbm
s\orcl\orcl\trace\orcl_ora_1160.trc output=c:\aa.txt

TKPROF: Release 11.2.0.1.0 - Development on 星期六 10月 6 23:51:07 2012
Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.

4.打开c:\aa.txt, 就会看到关于SQL语句 ‘ select count(*) from t1;’ 的执行计划

[sql] view plain copy ********************************************************************************  
SQL ID: 5bc0v4my7dvr5  
Plan Hash: 3724264953  
select count(*)  
from  
 t1  
  
  
call     count       cpu    elapsed       disk      query    current        rows  
------- ------  -------- ---------- ---------- ---------- ----------  ----------  
Parse        1      0.00       0.04          0          1          0           0  
Execute      1      0.00       0.00          0          0          0           0  
Fetch        2      0.03       0.01          0       1070          0           1  
------- ------  -------- ---------- ---------- ---------- ----------  ----------  
total        4      0.03       0.06          0       1071          0           1  
  
Misses in library cache during parse: 1  
Optimizer mode: ALL_ROWS  
Parsing user id: 91    
  
Rows     Row Source Operation  
-------  ---------------------------------------------------  
      1  SORT AGGREGATE (cr=1070 pr=0 pw=0 time=0 us)  
  72597   TABLE ACCESS FULL T1 (cr=1070 pr=0 pw=0 time=172543 us cost=298 size=0 card=66014)  
  
********************************************************************************