Oracle查看trace文件步骤


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 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)

********************************************************************************