固定执行计划-使用coe_xfr_sql_profile

一、历史执行计划固定

历史的执行计划找到一个合理的执行计划进行绑定

1. 存在多个执行计划的语句，按照索引是比较合适的，FULL SCAN不合适

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select * from  scott.emp  where deptno=30

 

select * from table(dbms_xplan.display_cursor('4hpk08j31nm7y',null))

 

SQL_ID  4hpk08j31nm7y, child number 0

-------------------------------------

select * from  scott.emp  where deptno=30

  

Plan hash value: 1404472509

  

------------------------------------------------------------------------------------------------

| Id  | Operation                   | Name             | Rows  | Bytes | Cost (%CPU)| Time     |

------------------------------------------------------------------------------------------------

|   0 | SELECT STATEMENT            |                  |       |       |     2 (100)|          |

|   1 |  TABLE ACCESS BY INDEX ROWID| EMP              |     6 |   228 |     2   (0)| 00:00:01 |

|*  2 |   INDEX RANGE SCAN          | INDEX_EMP_DEPTNO |     6 |       |     1   (0)| 00:00:01 |

------------------------------------------------------------------------------------------------

  

Predicate Information (identified by operation id):

---------------------------------------------------

  

   2 - access("DEPTNO"=30)

  

SQL_ID  4hpk08j31nm7y, child number 1

-------------------------------------

select * from  scott.emp  where deptno=30

  

Plan hash value: 3956160932

  

--------------------------------------------------------------------------

| Id  | Operation         | Name | Rows  | Bytes | Cost (%CPU)| Time     |

--------------------------------------------------------------------------

|   0 | SELECT STATEMENT  |      |       |       |     3 (100)|          |

|*  1 |  TABLE ACCESS FULL| EMP  |     6 |   228 |     3   (0)| 00:00:01 |

--------------------------------------------------------------------------

  

Predicate Information (identified by operation id):

---------------------------------------------------

  

   1 - filter("DEPTNO"=30)

存在两个执行计划，使之后的SQL语句都走Plan hash value: 1404472509 处理模

2、运行coe_xfr_sql_profile脚本来绑定

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sys@GULL> @coe_xfr_sql_profile.SQL

 

Parameter 1:

SQL_ID (required)

 

输入 1 的值:  4hpk08j31nm7y

 

 

PLAN_HASH_VALUE AVG_ET_SECS

--------------- -----------

     1404472509        .002

     3956160932        .015

 

Parameter 2:

PLAN_HASH_VALUE (required)

 

输入 2 的值:  1404472509

 

Values passed to coe_xfr_sql_profile:

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

SQL_ID         : "4hpk08j31nm7y"

PLAN_HASH_VALUE: "1404472509"

 

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_4hpk08j31nm7y_1404472509.sql

on TARGET system in order to create a custom SQL Profile

with plan 1404472509 linked to adjusted sql_text.

 

 

COE_XFR_SQL_PROFILE completed.

 

sys@GULL> @coe_xfr_sql_profile_4hpk08j31nm7y_1404472509.sql

sys@GULL> REM

sys@GULL> REM $Header: 215187.1 coe_xfr_sql_profile_4hpk08j31nm7y_1404472509.sql 11.4.3.5 2016/06/20 carlos.sierra $

sys@GULL> REM

sys@GULL> REM Copyright (c) 2000-2011, Oracle Corporation. All rights reserved.

sys@GULL> REM

sys@GULL> REM AUTHOR

sys@GULL> REM   carlos.sierra@oracle.com

sys@GULL> REM

sys@GULL> REM SCRIPT

sys@GULL> REM   coe_xfr_sql_profile_4hpk08j31nm7y_1404472509.sql

sys@GULL> REM

sys@GULL> REM DESCRIPTION

sys@GULL> REM   This script is generated by coe_xfr_sql_profile.sql

sys@GULL> REM   It contains the SQL*Plus commands to create a custom

sys@GULL> REM   SQL Profile for SQL_ID 4hpk08j31nm7y based on plan hash

sys@GULL> REM   value 1404472509.

sys@GULL> REM   The custom SQL Profile to be created by this script

sys@GULL> REM   will affect plans for SQL commands with signature

sys@GULL> REM   matching the one for SQL Text below.

sys@GULL> REM   Review SQL Text and adjust accordingly.

sys@GULL> REM

sys@GULL> REM PARAMETERS

sys@GULL> REM   None.

sys@GULL> REM

sys@GULL> REM EXAMPLE

sys@GULL> REM   SQL> START coe_xfr_sql_profile_4hpk08j31nm7y_1404472509.sql;

sys@GULL> REM

sys@GULL> REM NOTES

sys@GULL> REM   1. Should be run as SYSTEM or SYSDBA.

sys@GULL> REM   2. User must have CREATE ANY SQL PROFILE privilege.

sys@GULL> REM   3. SOURCE and TARGET systems can be the same or similar.

sys@GULL> REM   4. To drop this custom SQL Profile after it has been created:

sys@GULL> REM      EXEC DBMS_SQLTUNE.DROP_SQL_PROFILE('coe_4hpk08j31nm7y_1404472509');

sys@GULL> REM   5. Be aware that using DBMS_SQLTUNE requires a license

sys@GULL> REM      for the Oracle Tuning Pack.

sys@GULL> REM

sys@GULL> WHENEVER SQLERROR EXIT SQL.SQLCODE;

sys@GULL> REM

sys@GULL> VAR signature NUMBER;

sys@GULL> REM

sys@GULL> DECLARE

  2  sql_txt CLOB;

  3  h       SYS.SQLPROF_ATTR;

  4  BEGIN

  5  sql_txt := q'[

  6  select * from  scott.emp  where deptno=30

  7  ]';

  8  h := SYS.SQLPROF_ATTR(

  9  q'[BEGIN_OUTLINE_DATA]',

 10  q'[IGNORE_OPTIM_EMBEDDED_HINTS]',

 11  q'[OPTIMIZER_FEATURES_ENABLE('11.2.0.3')]',

 12  q'[DB_VERSION('11.2.0.3')]',

 13  q'[OPT_PARAM('optimizer_dynamic_sampling' 0)]',

 14  q'[ALL_ROWS]',

 15  q'[OUTLINE_LEAF(@"SEL$1")]',

 16  q'[INDEX_RS_ASC(@"SEL$1" "EMP"@"SEL$1" ("EMP"."DEPTNO"))]',

 17  q'[END_OUTLINE_DATA]');

 18  :signature := DBMS_SQLTUNE.SQLTEXT_TO_SIGNATURE(sql_txt);

 19  DBMS_SQLTUNE.IMPORT_SQL_PROFILE (

 20  sql_text    => sql_txt,

 21  profile     => h,

 22  name        => 'coe_4hpk08j31nm7y_1404472509',

 23  description => 'coe 4hpk08j31nm7y 1404472509 '||:signature||'',

 24  category    => 'DEFAULT',

 25  validate    => TRUE,

 26  replace     => TRUE,

 27  force_match => FALSE /* TRUE:FORCE (match even when different literals in SQL). FALSE:EXACT (similar to CURSOR_SHARING) */ );

 28  END;

 29  /

 

PL/SQL 过程已成功完成。

 

sys@GULL> WHENEVER SQLERROR CONTINUE

sys@GULL> SET ECHO OFF;

 

            SIGNATURE

---------------------

  7148830044791940844

 

 

... manual custom SQL Profile has been created

 

 

COE_XFR_SQL_PROFILE_4hpk08j31nm7y_1404472509 completed

执行COE_XFR_SQL_PROFILE_4hpk08j31nm7y_1404472509

3、再此重新执行语句

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select * from  scott.emp  where deptno=30

 

select * from table(dbms_xplan.display_cursor(null,null))

 

SQL_ID  4hpk08j31nm7y, child number 2

-------------------------------------

select * from  scott.emp  where deptno=30

  

Plan hash value: 1404472509

  

------------------------------------------------------------------------------------------------

| Id  | Operation                   | Name             | Rows  | Bytes | Cost (%CPU)| Time     |

------------------------------------------------------------------------------------------------

|   0 | SELECT STATEMENT            |                  |       |       |    10 (100)|          |

|   1 |  TABLE ACCESS BY INDEX ROWID| EMP              |     6 |   228 |    10   (0)| 00:00:01 |

|*  2 |   INDEX RANGE SCAN          | INDEX_EMP_DEPTNO |     6 |       |     5   (0)| 00:00:01 |

------------------------------------------------------------------------------------------------

  

Predicate Information (identified by operation id):

---------------------------------------------------

  

   2 - access("DEPTNO"=30)

  

Note

-----

   - SQL profile coe_4hpk08j31nm7y_1404472509 used for this statement

SQL profile coe_4hpk08j31nm7y_1404472509 used for this statement，说明sql profile已经绑定上，执行计划已这个为最佳，为止绑定处理

 

二、自己来构造合理的执行计划

1、构造执行计划

以下例子中sql语句走的是全表扫描，没有走索引，构造一个走索引的语句，来替换全表扫描执行计划

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alter session set optimizer_index_cost_adj=500

 

select * from  scott.emp  where deptno=30

 

select * from table(dbms_xplan.display_cursor(null,null))

 

SQL_ID  4hpk08j31nm7y, child number 0

-------------------------------------

select * from  scott.emp  where deptno=30

  

Plan hash value: 3956160932

  

--------------------------------------------------------------------------

| Id  | Operation         | Name | Rows  | Bytes | Cost (%CPU)| Time     |

--------------------------------------------------------------------------

|   0 | SELECT STATEMENT  |      |       |       |     3 (100)|          |

|*  1 |  TABLE ACCESS FULL| EMP  |     6 |   228 |     3   (0)| 00:00:01 |

--------------------------------------------------------------------------

  

Predicate Information (identified by operation id):

---------------------------------------------------

  

   1 - filter("DEPTNO"=30)

执行现存在的coe_xfr_sql_profile

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sys@GULL> @coe_xfr_sql_profile.SQL

 

Parameter 1:

SQL_ID (required)

 

输入 1 的值:  4hpk08j31nm7y

 

 

PLAN_HASH_VALUE AVG_ET_SECS

--------------- -----------

     3956160932        .041

 

Parameter 2:

PLAN_HASH_VALUE (required)

 

输入 2 的值:  3956160932

 

Values passed to coe_xfr_sql_profile:

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

SQL_ID         : "4hpk08j31nm7y"

PLAN_HASH_VALUE: "3956160932 "

 

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_4hpk08j31nm7y_3956160932.sql

on TARGET system in order to create a custom SQL Profile

with plan 3956160932 linked to adjusted sql_text.

 

 

COE_XFR_SQL_PROFILE completed.

查看构造SQL的走索引执行计划coe_xfr_sql_profile

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select /*+index(emp index_emp_deptno)*/ * from  scott.emp  where deptno=30

 

select * from table(dbms_xplan.display_cursor(null,null))

 

SQL_ID  2hdyvqk9b09va, child number 0

-------------------------------------

select /*+index(emp index_emp_deptno)*/ * from  scott.emp  where

deptno=30

  

Plan hash value: 1404472509

  

------------------------------------------------------------------------------------------------

| Id  | Operation                   | Name             | Rows  | Bytes | Cost (%CPU)| Time     |

------------------------------------------------------------------------------------------------

|   0 | SELECT STATEMENT            |                  |       |       |    10 (100)|          |

|   1 |  TABLE ACCESS BY INDEX ROWID| EMP              |     6 |   228 |    10   (0)| 00:00:01 |

|*  2 |   INDEX RANGE SCAN          | INDEX_EMP_DEPTNO |     6 |       |     5   (0)| 00:00:01 |

------------------------------------------------------------------------------------------------

  

Predicate Information (identified by operation id):

---------------------------------------------------

  

   2 - access("DEPTNO"=30)

查看次构造SQL的coe_xfr_sql_profile

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SQL>@coe_xfr_sql_profile.SQL 2hdyvqk9b09va

 

Parameter 1:

SQL_ID (required)

 

 

 

PLAN_HASH_VALUE AVG_ET_SECS

--------------- -----------

     1404472509        .001

 

Parameter 2:

PLAN_HASH_VALUE (required)

 

输入 2 的值:  1404472509

 

Values passed to coe_xfr_sql_profile:

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

SQL_ID         : "2hdyvqk9b09va"

PLAN_HASH_VALUE: "1404472509"

 

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_2hdyvqk9b09va_1404472509.sql

on TARGET system in order to create a custom SQL Profile

with plan 1404472509 linked to adjusted sql_text.

 

 

COE_XFR_SQL_PROFILE completed.

2、替换outline data

查看coe_xfr_sql_profile_2hdyvqk9b09va_1404472509.sql信息，需要替换的是这段内容

复制代码

h := SYS.SQLPROF_ATTR(
q'[BEGIN_OUTLINE_DATA]',
q'[IGNORE_OPTIM_EMBEDDED_HINTS]',
q'[OPTIMIZER_FEATURES_ENABLE('11.2.0.3')]',
q'[DB_VERSION('11.2.0.3')]',
q'[OPT_PARAM('optimizer_dynamic_sampling' 0)]',
q'[OPT_PARAM('optimizer_index_cost_adj' 500)]',
q'[ALL_ROWS]',
q'[OUTLINE_LEAF(@"SEL$1")]',
q'[INDEX_RS_ASC(@"SEL$1" "EMP"@"SEL$1" ("EMP"."DEPTNO"))]',
q'[END_OUTLINE_DATA]');

复制代码

把这个内容替换到coe_xfr_sql_profile_4hpk08j31nm7y_3956160932.sql 中

复制代码

h := SYS.SQLPROF_ATTR(
q'[BEGIN_OUTLINE_DATA]',
q'[IGNORE_OPTIM_EMBEDDED_HINTS]',
q'[OPTIMIZER_FEATURES_ENABLE('11.2.0.3')]',
q'[DB_VERSION('11.2.0.3')]',
q'[OPT_PARAM('optimizer_dynamic_sampling' 0)]',
q'[OPT_PARAM('optimizer_index_cost_adj' 500)]',
q'[ALL_ROWS]',
q'[OUTLINE_LEAF(@"SEL$1")]',
q'[FULL(@"SEL$1" "EMP"@"SEL$1")]',
q'[END_OUTLINE_DATA]');

复制代码

这段信息后，执行coe_xfr_sql_profile_4hpk08j31nm7y_3956160932.sql 这个脚本

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SQL>@coe_xfr_sql_profile_4hpk08j31nm7y_3956160932.sql

SQL>REM

SQL>REM $Header: 215187.1 coe_xfr_sql_profile_4hpk08j31nm7y_3956160932.sql 11.4.3.5 2016/06/20 carlos.sierra $

SQL>REM

SQL>REM Copyright (c) 2000-2011, 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_4hpk08j31nm7y_3956160932.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 4hpk08j31nm7y based on plan hash

SQL>REM   value 3956160932.

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_4hpk08j31nm7y_3956160932.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_4hpk08j31nm7y_3956160932');

SQL>REM   5. Be aware that using DBMS_SQLTUNE requires a license

SQL>REM  for the Oracle Tuning Pack.

SQL>REM

SQL>WHENEVER SQLERROR EXIT SQL.SQLCODE;

SQL>REM

SQL>VAR signature NUMBER;

SQL>REM

SQL>DECLARE

  2  sql_txt CLOB;

  3  h       SYS.SQLPROF_ATTR;

  4  BEGIN

  5  sql_txt := q'[

  6  select * from  scott.emp  where deptno=30

  7  ]';

  8  h := SYS.SQLPROF_ATTR(

  9  q'[BEGIN_OUTLINE_DATA]',

 10  q'[IGNORE_OPTIM_EMBEDDED_HINTS]',

 11  q'[OPTIMIZER_FEATURES_ENABLE('11.2.0.3')]',

 12  q'[DB_VERSION('11.2.0.3')]',

 13  q'[OPT_PARAM('optimizer_dynamic_sampling' 0)]',

 14  q'[OPT_PARAM('optimizer_index_cost_adj' 500)]',

 15  q'[ALL_ROWS]',

 16  q'[OUTLINE_LEAF(@"SEL$1")]',

 17  q'[INDEX_RS_ASC(@"SEL$1" "EMP"@"SEL$1" ("EMP"."DEPTNO"))]',

 18  q'[END_OUTLINE_DATA]');

 19  :signature := DBMS_SQLTUNE.SQLTEXT_TO_SIGNATURE(sql_txt);

 20  DBMS_SQLTUNE.IMPORT_SQL_PROFILE (

 21  sql_text    => sql_txt,

 22  profile     => h,

 23  name        => 'coe_4hpk08j31nm7y_3956160932',

 24  description => 'coe 4hpk08j31nm7y 3956160932 '||:signature||'',

 25  category    => 'DEFAULT',

 26  validate    => TRUE,

 27  replace     => TRUE,

 28  force_match => FALSE /* TRUE:FORCE (match even when different literals in SQL). FALSE:EXACT (similar to CURSOR_SHARING) */ );

 29  END;

 30  /

 

PL/SQL 过程已成功完成。

 

SQL>WHENEVER SQLERROR CONTINUE

SQL>SET ECHO OFF;

 

            SIGNATURE

---------------------

  7148830044791940844

 

 

... manual custom SQL Profile has been created

 

 

COE_XFR_SQL_PROFILE_4hpk08j31nm7y_3956160932 completed

3、再次语句查看执行计划

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select * from  scott.emp  where deptno=30

 

select * from table(dbms_xplan.display_cursor(null,null))

 

SQL_ID  4hpk08j31nm7y, child number 0

-------------------------------------

select * from  scott.emp  where deptno=30

  

Plan hash value: 1404472509

  

------------------------------------------------------------------------------------------------

| Id  | Operation                   | Name             | Rows  | Bytes | Cost (%CPU)| Time     |

------------------------------------------------------------------------------------------------

|   0 | SELECT STATEMENT            |                  |       |       |    10 (100)|          |

|   1 |  TABLE ACCESS BY INDEX ROWID| EMP              |     6 |   228 |    10   (0)| 00:00:01 |

|*  2 |   INDEX RANGE SCAN          | INDEX_EMP_DEPTNO |     6 |       |     5   (0)| 00:00:01 |

------------------------------------------------------------------------------------------------

  

Predicate Information (identified by operation id):

---------------------------------------------------

  

   2 - access("DEPTNO"=30)

  

Note

-----

   - SQL profile coe_4hpk08j31nm7y_3956160932 used for this statement

偷梁换柱成功，固定执行so easy

提供脚本文件COE_XFR_SQL_PROFILE.SQL

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