Oracle SQL调优系列之SQL Monitor Report

1、SQL Monitor简介

SQL调优系列博客链接：SQL调优专栏

sql monitor是oracle官方提供的自动监控符合特定条件的SQL，用于收集执行时的细节信息的监控工具，常用于sql调优和系统性能监控

2、捕捉sql的前提

sql monitor 捕捉sql的前提：

• 并行执行的sql语句
• 单次执行消耗的CPU或IO超过5秒
• statistics_level级别必须是TYPICAL 或者ALL
• 使用/* +MONITOR*/ HINT的SQL语句

3、SQL Monitor 参数设置

• STATISTICS_LEVEL必须设置为：‘TYPICAL’（缺省）或者 ‘ALL’
• CONTROL_MANAGEMENT_PACK_ACCESS设置为：‘DIAGNOSTIC+TUNING’

查看statistics_level参数

show parameter statistics_level;

  

 

  
1
 

建议还是改变Session就可以

alter session set statistics_level=ALL;


  

 

  
1
  
2
 

查看参数CONTROL_MANAGEMENT_PACK_ACCESS

show parameter CONTROL_MANAGEMENT_PACK_ACCESS;

  

 

  
1
 

4、SQL Monitor Report

本博客采用DBMS_SQLTUNE包DBMS_SQLTUNE.report_sql_monitor的方式获取，报告格式有：‘TEXT’，‘HTML’，‘XML’ ，‘ACTIVE’，其中’ACTIVE’只在11g R2以后才支持

4.1、SQL_ID获取

sql monitor使用，必须在sql中使用/* +MONITOR*/ Hint，然后数据会存在v$sql_monitor表里

随意找条sql，注意要加/*+ moniotr*/

select /*+ moniotr*/ a.user_code, a.full_name, a.user_pwd, c.unit_code, c.unit_name
  from base_user a
  left join (select ur.user_code, ur.unit_code from t_user_role ur where ur.user_role < 10) b on a.user_code = b.user_code
  left join t_unit_info c on b.unit_code = c.unit_code
 where c.unit_code in (select uinfo.unit_code from t_unit_info uinfo start with uinfo.unit_code = '15803' connect by prior uinfo.unit_code = uinfo.para_unit_code); 
  

 

  
1
  
2
  
3
  
4
  
5
  
6
  
7
  
8
  
9
  
10
  
11
  
12
  
13
  
14
  
15
 

提供sql查询，获取sql_id

select sql_id,sql_text from v$sql_monitor where sql_text like '%t_unit_info%

  

 

  
1
 

4.2、Text文本格式

将上面查询到的sql_id改下，然后执行如下SQL：

SET LONG 1000000
SET LONGCHUNKSIZE 1000000
SET LINESIZE 1000
SET PAGESIZE 0
SET TRIM ON
SET TRIMSPOOL ON
SET ECHO OFF
SET FEEDBACK OFF
spool report_sql_monitor_text.txt
SELECT DBMS_SQLTUNE.REPORT_SQL_MONITOR(
  SQL_ID => 'g9rtj389t0g66',
  TYPE => 'TEXT',
  REPORT_LEVEL => 'ALL') AS REPORT
FROM dual;
spool off


  

 

  
1
  
2
  
3
  
4
  
5
  
6
  
7
  
8
  
9
  
10
  
11
  
12
  
13
  
14
  
15
  
16
 

获取到text格式的sql monitor

4.3、Html格式

SET LONG 1000000
SET LONGCHUNKSIZE 1000000
SET LINESIZE 1000
SET PAGESIZE 0
SET TRIM ON
SET TRIMSPOOL ON
SET ECHO OFF
SET FEEDBACK OFF
spool report_sql_monitor_html.html
SELECT DBMS_SQLTUNE.REPORT_SQL_MONITOR(
  SQL_ID => 'g9rtj389t0g66',
  TYPE => 'HTML',
  REPORT_LEVEL => 'ALL') AS REPORT
FROM dual;
spool off

  

 

  
1
  
2
  
3
  
4
  
5
  
6
  
7
  
8
  
9
  
10
  
11
  
12
  
13
  
14
  
15
 

获取到对应报告，可以看到执行计划、Buffer Gets 等等信息

4.4、ACTIVE格式

ACTIVE格式需要下载相应的flash组件、脚本，详细见SQL Monitor Report 使用详解

SET LONG 1000000
SET LONGCHUNKSIZE 1000000
SET LINESIZE 1000
SET PAGESIZE 0
SET TRIM ON
SET TRIMSPOOL ON
SET ECHO OFF
SET FEEDBACK OFF
spool report_sql_monitor_active.html
SELECT DBMS_SQLTUNE.REPORT_SQL_MONITOR(
  SQL_ID => '2rjh5d5k2yujz',
  TYPE => 'ACTIVE',
  REPORT_LEVEL => 'ALL',
  BASE_PATH => 'http://ip/script') AS REPORT
FROM dual;
spool off


  

 

  
1
  
2
  
3
  
4
  
5
  
6
  
7
  
8
  
9
  
10
  
11
  
12
  
13
  
14
  
15
  
16
  
17
 

4.5 SQL Monitoring list

如果要获取所有sql monitor，就可以使用如下SQL：

SET LONG 1000000
SET LONGCHUNKSIZE 1000000
SET LINESIZE 1000
SET PAGESIZE 0
SET TRIM ON
SET TRIMSPOOL ON
SET ECHO OFF
SET FEEDBACK OFF
SPOOL report_sql_monitor_list.html
SELECT dbms_sqltune.report_sql_monitor_list(
  type => 'HTML',
  report_level => 'ALL') AS report
FROM dual;
SPOOL OFF

  

 

  
1
  
2
  
3
  
4
  
5
  
6
  
7
  
8
  
9
  
10
  
11
  
12
  
13
  
14
 

5、SQL Monitor Report查询

提供sql monitor常用的查询脚本

5.1、查看所有的sql monitor report

• 查看所有的sql monitor report

   select dbms_sqltune.report_sql_monitor from dual;

  

 

  
1
 

5.2、查看某个sql的sql monitor report

• 查看某个sql的sql monitor report

  SELECT DBMS_SQLTUNE.report_sql_monitor(sql_id => '2rjh5d5k2yujz', type => 'TEXT') from dual;

  

 

  
1
 

5.3、查看某个sql的整体性能

• 查看某个sql的整体性能

   SELECT DBMS_SQLTUNE.report_sql_monitor_list(sql_id=>'2rjh5d5k2yujz',type =>'TEXT',report_level => 'ALL') AS report FROM dual;

  

 

  
1
 

5.4、查看整个系统的性能

• 查看整个系统的性能

   SELECT DBMS_SQLTUNE.report_sql_monitor_list(type =>'TEXT',report_level => 'ALL') AS report FROM dual;


  

 

  
1
  
2
 

相关SQL脚本下载：sql download

文章来源: smilenicky.blog.csdn.net，作者：smileNicky，版权归原作者所有，如需转载，请联系作者。

原文链接：smilenicky.blog.csdn.net/article/details/106851339