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'