使用coe_xfr_sql_profile 绑定执行计划简单练习
来源:互联网 发布:淘宝打不开卖家店铺 编辑:程序博客网 时间:2024/06/06 07:30
应用有时候时快时慢,这时候可能会用到sql绑定。
一个简单的例子手动构造
适用于9.2之后的版本
需要
1)coe_xfr_sql_profile.sql (目前有两个版本一个是9.2和10.1的版本http://download.csdn.net/detail/huoshuyinhua/9652926;一个是之后的新版本地址http://download.csdn.net/detail/huoshuyinhua/9652918)
2)sql的sql_id hash 值
sql_id 该语句的id
hash 值 记录该语句执行计划的一个值
下面的实验纯粹为了演示步骤,实际上所需的hash是效率比较好的执行计划产生的。(awr 报告,手动构造 sqlrpt等等)
已表ttvv为例(该表为ctas emp创建)查询该表(实际生成一条语句)
SQL> select ename from ttvv where deptno=10;
ENAME
----------
CLARK
KING
MILLER
1)查看该语句对应的sql_id
SQL> select sql_id,sql_text from v$sql where sql_text like 'select ename from ttvv%';SQL_ID
-------------
SQL_TEXT
--------------------------------------------------------------------------------
16vjcwfzy5qk3
select ename from ttvv where deptno=10
2)查看执行计划(实际为了获取hash)
SQL> select * from table(dbms_xplan.display_cursor('16vjcwfzy5qk3',null));
PLAN_TABLE_OUTPUT
--------------------------------------------------------------------------------
SQL_ID 16vjcwfzy5qk3, child number 0
-------------------------------------
select ename from ttvv where deptno=10
Plan hash value: 3876991463
--------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
--------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | | | 3 (100)| |
|* 1 | TABLE ACCESS FULL| TTVV | 3 | 60 | 3 (0)| 00:00:01 |
PLAN_TABLE_OUTPUT
--------------------------------------------------------------------------------
--------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
1 - filter("DEPTNO"=10)
Note
-----
- dynamic sampling used for this statement (level=2)
22 rows selected.
3)生成该语句的执行计划的profile文件 (如果查询条件使用字符可以加force_match => true来强制匹配)
SQL> START coe_xfr_sql_profile.sql 16vjcwfzy5qk3 3876991463
Parameter 1:
SQL_ID (required)
PLAN_HASH_VALUE AVG_ET_SECS
--------------- -----------
3876991463 .001
Parameter 2:
PLAN_HASH_VALUE (required)
Values passed to coe_xfr_sql_profile:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
SQL_ID : "16vjcwfzy5qk3"
PLAN_HASH_VALUE: "3876991463"
SQL>BEGIN
2 IF :sql_text IS NULL THEN
3 RAISE_APPLICATION_ERROR(-20100, 'SQL_TEXT for SQL_ID &&sql_id. was not found in memory (gv$sqltext_with_newlines) or AWR (dba_hist_sqltext).');
4 END IF;
5 END;
6 /
SQL>SET TERM OFF;
SQL>BEGIN
2 IF :other_xml IS NULL THEN
3 RAISE_APPLICATION_ERROR(-20101, 'PLAN for SQL_ID &&sql_id. and PHV &&plan_hash_value. was not found in memory (gv$sql_plan) or AWR (dba_hist_sql_plan).');
4 END IF;
5 END;
6 /
SQL>SET TERM OFF;
Execute coe_xfr_sql_profile_16vjcwfzy5qk3_3876991463.sql
on TARGET system in order to create a custom SQL Profile
with plan 3876991463 linked to adjusted sql_text.
COE_XFR_SQL_PROFILE completed.
4.上面生成了一个文件coe_xfr_sql_profile_16vjcwfzy5qk3_3876991463.sql 执行它
SQL>START coe_xfr_sql_profile.sql 16vjcwfzy5qk3 3876991463
Parameter 1:
SQL_ID (required)
PLAN_HASH_VALUE AVG_ET_SECS
--------------- -----------
3876991463 .001
Parameter 2:
PLAN_HASH_VALUE (required)
Values passed to coe_xfr_sql_profile:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
SQL_ID : "16vjcwfzy5qk3"
PLAN_HASH_VALUE: "3876991463"
SQL>BEGIN
2 IF :sql_text IS NULL THEN
3 RAISE_APPLICATION_ERROR(-20100, 'SQL_TEXT for SQL_ID &&sql_id. was not found in memory (gv$sqltext_with_newlines) or AWR (dba_hist_sqltext).');
4 END IF;
5 END;
6 /
SQL>SET TERM OFF;
SQL>BEGIN
2 IF :other_xml IS NULL THEN
3 RAISE_APPLICATION_ERROR(-20101, 'PLAN for SQL_ID &&sql_id. and PHV &&plan_hash_value. was not found in memory (gv$sql_plan) or AWR (dba_hist_sql_plan).');
4 END IF;
5 END;
6 /
SQL>SET TERM OFF;
Execute coe_xfr_sql_profile_16vjcwfzy5qk3_3876991463.sql
on TARGET system in order to create a custom SQL Profile
with plan 3876991463 linked to adjusted sql_text.
COE_XFR_SQL_PROFILE completed.
SQL>SQL>@coe_xfr_sql_profile_16vjcwfzy5qk3_3876991463.sql
SQL>REM
SQL>REM $Header: 215187.1 coe_xfr_sql_profile_16vjcwfzy5qk3_3876991463.sql 11.4.4.4 2016/10/13 carlos.sierra $
SQL>REM
SQL>REM Copyright (c) 2000-2012, Oracle Corporation. All rights reserved.
SQL>REM
SQL>REM AUTHOR
SQL>REM carlos.sierra@oracle.com
SQL>REM
SQL>REM SCRIPT
SQL>REM coe_xfr_sql_profile_16vjcwfzy5qk3_3876991463.sql
SQL>REM
SQL>REM DESCRIPTION
SQL>REM This script is generated by coe_xfr_sql_profile.sql
SQL>REM It contains the SQL*Plus commands to create a custom
SQL>REM SQL Profile for SQL_ID 16vjcwfzy5qk3 based on plan hash
SQL>REM value 3876991463.
SQL>REM The custom SQL Profile to be created by this script
SQL>REM will affect plans for SQL commands with signature
SQL>REM matching the one for SQL Text below.
SQL>REM Review SQL Text and adjust accordingly.
SQL>REM
SQL>REM PARAMETERS
SQL>REM None.
SQL>REM
SQL>REM EXAMPLE
SQL>REM SQL> START coe_xfr_sql_profile_16vjcwfzy5qk3_3876991463.sql;
SQL>REM
SQL>REM NOTES
SQL>REM 1. Should be run as SYSTEM or SYSDBA.
SQL>REM 2. User must have CREATE ANY SQL PROFILE privilege.
SQL>REM 3. SOURCE and TARGET systems can be the same or similar.
SQL>REM 4. To drop this custom SQL Profile after it has been created:
SQL>REM EXEC DBMS_SQLTUNE.DROP_SQL_PROFILE('coe_16vjcwfzy5qk3_3876991463');
SQL>REM 5. Be aware that using DBMS_SQLTUNE requires a license
SQL>REM for the Oracle Tuning Pack.
SQL>REM 6. If you modified a SQL putting Hints in order to produce a desired
SQL>REM Plan, you can remove the artifical Hints from SQL Text pieces below.
SQL>REM By doing so you can create a custom SQL Profile for the original
SQL>REM SQL but with the Plan captured from the modified SQL (with Hints).
SQL>REM
SQL>WHENEVER SQLERROR EXIT SQL.SQLCODE;
SQL>REM
SQL>VAR signature NUMBER;
SQL>VAR signaturef NUMBER;
SQL>REM
SQL>DECLARE
2 sql_txt CLOB;
3 h SYS.SQLPROF_ATTR;
4 PROCEDURE wa (p_line IN VARCHAR2) IS
5 BEGIN
6 DBMS_LOB.WRITEAPPEND(sql_txt, LENGTH(p_line), p_line);
7 END wa;
8 BEGIN
9 DBMS_LOB.CREATETEMPORARY(sql_txt, TRUE);
10 DBMS_LOB.OPEN(sql_txt, DBMS_LOB.LOB_READWRITE);
11 -- SQL Text pieces below do not have to be of same length.
12 -- So if you edit SQL Text (i.e. removing temporary Hints),
13 -- there is no need to edit or re-align unmodified pieces.
14 wa(q'[select ename from ttvv where deptno=10]');
15 DBMS_LOB.CLOSE(sql_txt);
16 h := SYS.SQLPROF_ATTR(
17 q'[BEGIN_OUTLINE_DATA]',
18 q'[IGNORE_OPTIM_EMBEDDED_HINTS]',
19 q'[OPTIMIZER_FEATURES_ENABLE('11.2.0.4')]',
20 q'[DB_VERSION('11.2.0.4')]',
21 q'[ALL_ROWS]',
22 q'[OUTLINE_LEAF(@"SEL$1")]',
23 q'[FULL(@"SEL$1" "TTVV"@"SEL$1")]',
24 q'[END_OUTLINE_DATA]');
25 :signature := DBMS_SQLTUNE.SQLTEXT_TO_SIGNATURE(sql_txt);
26 :signaturef := DBMS_SQLTUNE.SQLTEXT_TO_SIGNATURE(sql_txt, TRUE);
27 DBMS_SQLTUNE.IMPORT_SQL_PROFILE (
28 sql_text => sql_txt,
29 profile => h,
30 name => 'coe_16vjcwfzy5qk3_3876991463',
31 description => 'coe 16vjcwfzy5qk3 3876991463 '||:signature||' '||:signaturef||'',
32 category => 'DEFAULT',
33 validate => TRUE,
34 replace => TRUE,
35 force_match => FALSE /* TRUE:FORCE (match even when different literals in SQL). FALSE:EXACT (similar to CURSOR_SHARING) */ );
36 DBMS_LOB.FREETEMPORARY(sql_txt);
37 END;
38 /
PL/SQL procedure successfully completed.
SQL>WHENEVER SQLERROR CONTINUE
SQL>SET ECHO OFF;
SIGNATURE
---------------------
15680234406244522204
SIGNATUREF
---------------------
10847459596262927715
... manual custom SQL Profile has been created
COE_XFR_SQL_PROFILE_16vjcwfzy5qk3_3876991463 completed
SQL>
5.执行完查看是否更改成功
SQL>select SQL_ID, SQL_PROFILE,PLAN_HASH_VALUE from V$SQL where SQL_ID='16vjcwfzy5qk3';
SQL_ID SQL_PROFILE
------------- ----------------------------------------------------------------
PLAN_HASH_VALUE
---------------
16vjcwfzy5qk3
3876991463
0 0
- 使用coe_xfr_sql_profile 绑定执行计划简单练习
- 使用coe_xfr_sql_profile
- 使用SPM绑定执行计划
- SQL执行计划、绑定变量的使用
- 绑定执行计划sql_plan_baseline
- dbms_spm绑定执行计划
- 通过profile绑定执行计划
- DBMS_SPM.LOAD_PLANS_FROM_CURSOR_CACHE手工替换绑定执行计划
- Event 10053 执行计划 绑定变量
- 执行计划使用
- sql profile: 如何使用我们自定义的sql 执行计划来固定原sql执行计划 及 如何优化非绑定变量sql
- 执行计划的使用(EXPLAIN)
- 执行计划的使用(EXPLAIN)
- 使用OUTLINE调整执行计划
- 使用outline固定执行计划
- outline执行计划稳定使用
- 执行计划(是否使用索引)
- 使用命令行查看执行计划
- 关于Linq的ToList(),IEnumerable,IQueryable
- JS垫脚石-DOM篇1
- poi完美word转html(表格、图片、样式)
- Java 之注册表操作
- openbts自启动程序在ubuntu中是如何实现的?
- 使用coe_xfr_sql_profile 绑定执行计划简单练习
- 聚合数据火车票订票接口完成火车票订票流程(PHP)
- 应用发布到Apple store后如何分享给用户下载
- 四六级作文高分仿句来袭,赶快收藏吧————英语
- android 屏幕适配
- IOS 开发之 symbolicatecrash工具使用
- 转:Redis使用认证密码登录
- mysql distinct
- IOS 记录小技巧