TKPROF使用学习

 

启用tkprof

SQL> alter session set timed_statistics=true;

会话已更改。

SQL> alter session set events
 '10046 trace name context forever,level 12';

会话已更改。

tkprof tracefile outputfile [explain= ] [table= ] [print= ] [insert= ] [sys= ] [sort= ] ...

 

 

参数说明：

 

tracefile：你要分析的trace文件

outputfile：格式化后的文件

explain=user/password@connectstring

table=schema.tablename

    注1：这两个参数是一起使用的，通过连接数据库对在trace文件中出现的每条sql语句查看执行计划，并将之输出到outputfile中

     注2：该table必须是数据库中不存在的，如果存在会报错

print=n：只列出最初N个sql执行语句

insert=filename：会产生一个sql文件，运行此文件可将收集到的数据insert到数据库表中

sys=no：过滤掉由sys执行的语句

record=filename：可将非嵌套执行的sql语句过滤到指定的文件中去

waits=yes|no：是否统计任何等待事件

aggregate=yes|no：是否将相同sql语句的执行信息合计起来，默认为yes

sort= option：设置排序选项，选项如下：

    prscnt：number of times parse was called
    prscpu：cpu time parsing
    prsela：elapsed time parsing
    prsdsk：number of disk reads during parse
    prsqry：number of buffers for consistent read during parse
    prscu：number of buffers for current read during parse
    prsmis：number of misses in library cache during parse
    execnt：number of execute was called
    execpu：cpu time spent executing
    exeela：elapsed time executing
    exedsk：number of disk reads during execute
    exeqry：number of buffers for consistent read during execute
    execu：number of buffers for current read during execute
    exerow：number of rows processed during execute
    exemis：number of library cache misses during execute
    fchcnt：number of times fetch was called
    fchcpu：cpu time spent fetching
    fchela：elapsed time fetching
    fchdsk：number of disk reads during fetch
    fchqry：number of buffers for consistent read during fetch
    fchcu：number of buffers for current read during fetch
    fchrow：number of rows fetched
    userid：userid of user that parsed the cursor

可根据自己的需要设置排序

 

 

举例：

 

1.列出前2条sql语句的执行情况：

 

C:/>tkprof c:/oc_ora_2892.trc c:/cc.txt print=2

 

2.将数据保存到数据库：

 

C:/>tkprof c:/oc_ora_2892.trc c:/cc.txt insert=c:/insert.sql

 

执行后会在c:/产生insert.sql文件，执行该文件即可将数据保存到数据库，以下为insert.sql部分内容：

 

REM Edit and/or remove the following CREATE TABLE
REM statement as your needs dictate.
CREATE TABLE tkprof_table
(
date_of_insert DATE
,cursor_num NUMBER
,depth NUMBER
,user_id NUMBER
,parse_cnt NUMBER
,parse_cpu NUMBER
,parse_elap NUMBER
,parse_disk NUMBER
,parse_query NUMBER
,parse_current NUMBER
,parse_miss NUMBER
,exe_count NUMBER
,exe_cpu NUMBER
,exe_elap NUMBER
,exe_disk NUMBER
,exe_query NUMBER
,exe_current NUMBER
,exe_miss NUMBER
,exe_rows NUMBER
,fetch_count NUMBER
,fetch_cpu NUMBER
,fetch_elap NUMBER
,fetch_disk NUMBER
,fetch_query NUMBER
,fetch_current NUMBER
,fetch_rows NUMBER
,ticks NUMBER
,sql_statement LONG
);
INSERT INTO tkprof_table VALUES
(
SYSDATE, 1, 0, 61, 1, 0, 418, 0, 0, 0, 1
, 1, 15625, 1435, 0, 0, 0, 0, 0
, 4, 0, 4417, 0, 24, 0, 36, 13450151
, ’select * from tblinventoryhistory
‘);

 

3.提取sql执行语句：

 

C:/>tkprof c:/oc_ora_2892.trc c:/cc.txt record=sqlstr.sql

 

sqlstr.sql中的内容：

 

alter session set sql_trace=true ;
alter session set events '10046 trace name context forever,level 12';
select * from tblinventoryhistory ;
select * from tblorder ;
select * from tblproduct ;
select * from tbluser ;
select * from tblroute ;

 

4.产生执行计划：

 

C:/>tkprof c:/oc_ora_2892.trc c:/ff.txt explain=ocuser/ocuser table=ocuser.test1

 

在产生的ff.txt文件中会体现其执行计划：

 

Rows Execution Plan
——- —————————————————
0 SELECT STATEMENT GOAL: CHOOSE
0 TABLE ACCESS (FULL) OF 'TBLROUTE'