SPM適用的場景和示例
##spm開啟自動捕獲
SQL> show parameter sql_plan
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
optimizer_capture_sql_plan_baselines boolean FALSE
optimizer_use_sql_plan_baselines boolean TRUE
將optimizer_capture_sql_plan_baselines設為為true，開啟自動捕獲
##SPM批次載入
#1 cursor cache中載入
exec DBMS_SPM.LOAD_PLANS_FROM_CURSOR_CACHE('sql_id');
#2 從sql tuning set中載入
exec DBMS_SPM.LOAD_PLANS_FROM_SQLSET('sql_tuning_set_name');
select * from DBA_SQLSET;
# 3 透過函式建立中間表，並透過Data Dump匯出匯入
exec DBMS_SPM.CREATE_STGTAB_BASELINE
SQL> desc DBMS_SPM
FUNCTION ALTER_SQL_PLAN_BASELINE RETURNS BINARY_INTEGER
Argument Name Type In/Out Default?
------------------------------ ----------------------- ------ --------
SQL_HANDLE VARCHAR2 IN DEFAULT
PLAN_NAME VARCHAR2 IN DEFAULT
ATTRIBUTE_NAME VARCHAR2 IN
ATTRIBUTE_VALUE VARCHAR2 IN
PROCEDURE CONFIGURE
Argument Name Type In/Out Default?
------------------------------ ----------------------- ------ --------
PARAMETER_NAME VARCHAR2 IN
PARAMETER_VALUE NUMBER IN DEFAULT
PROCEDURE CREATE_STGTAB_BASELINE
Argument Name Type In/Out Default?
------------------------------ ----------------------- ------ --------
TABLE_NAME VARCHAR2 IN
TABLE_OWNER VARCHAR2 IN DEFAULT
TABLESPACE_NAME VARCHAR2 IN DEFAULT
FUNCTION DROP_MIGRATED_STORED_OUTLINE RETURNS BINARY_INTEGER
FUNCTION DROP_SQL_PLAN_BASELINE RETURNS BINARY_INTEGER
Argument Name Type In/Out Default?
------------------------------ ----------------------- ------ --------
SQL_HANDLE VARCHAR2 IN DEFAULT
PLAN_NAME VARCHAR2 IN DEFAULT
FUNCTION EVOLVE_SQL_PLAN_BASELINE RETURNS CLOB
Argument Name Type In/Out Default?
------------------------------ ----------------------- ------ --------
SQL_HANDLE VARCHAR2 IN DEFAULT
PLAN_NAME VARCHAR2 IN DEFAULT
TIME_LIMIT NUMBER(38) IN DEFAULT
VERIFY VARCHAR2 IN DEFAULT
COMMIT VARCHAR2 IN DEFAULT
FUNCTION EVOLVE_SQL_PLAN_BASELINE RETURNS CLOB
Argument Name Type In/Out Default?
------------------------------ ----------------------- ------ --------
PLAN_LIST NAME_LIST IN
TIME_LIMIT NUMBER(38) IN DEFAULT
VERIFY VARCHAR2 IN DEFAULT
COMMIT VARCHAR2 IN DEFAULT
FUNCTION LOAD_PLANS_FROM_CURSOR_CACHE RETURNS BINARY_INTEGER
Argument Name Type In/Out Default?
------------------------------ ----------------------- ------ --------
ATTRIBUTE_NAME VARCHAR2 IN
ATTRIBUTE_VALUE VARCHAR2 IN
FIXED VARCHAR2 IN DEFAULT
ENABLED VARCHAR2 IN DEFAULT
FUNCTION LOAD_PLANS_FROM_CURSOR_CACHE RETURNS BINARY_INTEGER
Argument Name Type In/Out Default?
------------------------------ ----------------------- ------ --------
SQL_ID VARCHAR2 IN
PLAN_HASH_VALUE NUMBER IN DEFAULT
FIXED VARCHAR2 IN DEFAULT
ENABLED VARCHAR2 IN DEFAULT
FUNCTION LOAD_PLANS_FROM_CURSOR_CACHE RETURNS BINARY_INTEGER
Argument Name Type In/Out Default?
------------------------------ ----------------------- ------ --------
SQL_ID VARCHAR2 IN
PLAN_HASH_VALUE NUMBER IN DEFAULT
SQL_TEXT CLOB IN
FIXED VARCHAR2 IN DEFAULT
ENABLED VARCHAR2 IN DEFAULT
FUNCTION LOAD_PLANS_FROM_CURSOR_CACHE RETURNS BINARY_INTEGER
Argument Name Type In/Out Default?
------------------------------ ----------------------- ------ --------
SQL_ID VARCHAR2 IN
PLAN_HASH_VALUE NUMBER IN DEFAULT
SQL_HANDLE VARCHAR2 IN
FIXED VARCHAR2 IN DEFAULT
ENABLED VARCHAR2 IN DEFAULT
FUNCTION LOAD_PLANS_FROM_SQLSET RETURNS BINARY_INTEGER
Argument Name Type In/Out Default?
------------------------------ ----------------------- ------ --------
SQLSET_NAME VARCHAR2 IN
SQLSET_OWNER VARCHAR2 IN DEFAULT
BASIC_FILTER VARCHAR2 IN DEFAULT
FIXED VARCHAR2 IN DEFAULT
ENABLED VARCHAR2 IN DEFAULT
COMMIT_ROWS NUMBER IN DEFAULT
FUNCTION MIGRATE_STORED_OUTLINE RETURNS CLOB
Argument Name Type In/Out Default?
------------------------------ ----------------------- ------ --------
ATTRIBUTE_NAME VARCHAR2 IN
ATTRIBUTE_VALUE CLOB IN DEFAULT
FIXED VARCHAR2 IN DEFAULT
FUNCTION MIGRATE_STORED_OUTLINE RETURNS CLOB
Argument Name Type In/Out Default?
------------------------------ ----------------------- ------ --------
OUTLN_LIST NAME_LIST IN
FIXED VARCHAR2 IN DEFAULT
FUNCTION PACK_STGTAB_BASELINE RETURNS NUMBER
Argument Name Type In/Out Default?
------------------------------ ----------------------- ------ --------
TABLE_NAME VARCHAR2 IN
TABLE_OWNER VARCHAR2 IN DEFAULT
SQL_HANDLE VARCHAR2 IN DEFAULT
PLAN_NAME VARCHAR2 IN DEFAULT
SQL_TEXT CLOB IN DEFAULT
CREATOR VARCHAR2 IN DEFAULT
ORIGIN VARCHAR2 IN DEFAULT
ENABLED VARCHAR2 IN DEFAULT
ACCEPTED VARCHAR2 IN DEFAULT
FIXED VARCHAR2 IN DEFAULT
MODULE VARCHAR2 IN DEFAULT
ACTION VARCHAR2 IN DEFAULT
FUNCTION UNPACK_STGTAB_BASELINE RETURNS NUMBER
Argument Name Type In/Out Default?
------------------------------ ----------------------- ------ --------
TABLE_NAME VARCHAR2 IN
TABLE_OWNER VARCHAR2 IN DEFAULT
SQL_HANDLE VARCHAR2 IN DEFAULT
PLAN_NAME VARCHAR2 IN DEFAULT
SQL_TEXT CLOB IN DEFAULT
CREATOR VARCHAR2 IN DEFAULT
ORIGIN VARCHAR2 IN DEFAULT
ENABLED VARCHAR2 IN DEFAULT
ACCEPTED VARCHAR2 IN DEFAULT
FIXED VARCHAR2 IN DEFAULT
MODULE VARCHAR2 IN DEFAULT
ACTION VARCHAR2 IN DEFAULT
SQL>
##適用場景
# 10G升級11G
1 在現有10G環境捕獲sql語句的執行計劃儲存在STS中
begin
DBMS_SQLTUNE.CREATE_SQLSET('STS111TEST');
DBMS_SQLTUNE.CAPTURE_CURSOR_CACHE_SQLSET(SQLSET_NAME => 'STS111TEST',
TIME_LIMIT => 120,
REPEAT_INTERVAL => 5
);
end;
/
上面PL/SQL塊表示：先建立STS111TEST的STS，採集時長120秒，每隔5秒採集一次sql執行計劃到STS中。
2 建立中間表(STGTAB111),並將 STS111TEST中的內容包裝到中間表(STGTAB111)中
begin
DBMS_SQLTUNE.CREATE_STGTAB_SQLSET('STGTAB111');
DBMS_SQLTUNE.PACK_STGTAB_SQLSET(SQLSET_NAME => 'STS111TEST',
STAGING_TABLE_NAME => 'STGTAB111'
);
end;
/
3 通exp/expdp,imp/impdp將STGTAB111表內容匯入11G目標資料中
exp system/oracle file=STGTAB111.dmp tables=STGTAB111
imp system/oracle file=STGTAB111.dmp full=y
4 下面的PL/SQL塊：現將中間表(STGTAB111)開啟並儲存在STS111TEST的STS內，然後再把這些語句的執行計劃匯入Plan Baseline中
declare
my_plans pls_integer;
begin
DBMS_SQLTUNE.UNPACK_STGTAB_SQLSET(SQLSET_NAME => 'STS111TEST',
SQLSET_OWNER => '%',
REPLACE => TRUE,
STAGING_TABLE_NAME => 'STGTAB111'
);
my_plans := DBMS_SQLTUNE.LOAD_PLANS_FROM_SQLSET(
SQLSET_NAME => 'STS111TEST',
SQLSET_OWNER => 'SYS',
BASIC_FILTER => 'sql_text like ''%''',
FIXED => 'YES',
ENABLED => 'YES',
COMMIT_ROWS => 1
);
end;
/
#從開發資料庫到生產資料庫
1 建立SPM_SAVED的stage表，在將SQL Plan Baseline資料匯入SPM_SAVED表
declare
spm number;
begin
DBMS_SPM.CREATE_STGTAB_BASELINE(
TABLE_NAME => 'SPM_SAVED',
TABLE_OWNER => 'SYSTEM'
);
spm := DBMS_SPM.PACK_STGTAB_BASELINE(
TABLE_NAME => 'SPM_SAVED',
TABLE_OWNER => 'SYSTEM'
);
end;
/
2 通exp/expdp,imp/impdp將SPM_SAVED表內容匯入生產資料中
exp system/oracle file=SPM_SAVED.dmp tables=SPM_SAVED
imp system/oracle file=SPM_SAVED.dmp full=y
3 將SPM_SAVED表的內容匯入生產庫的QL Plan Baseline
declare
spm number;
begin
spm := DBMS_SPM.UNPACK_STGTAB_BASELINE(
TABLE_NAME => 'SPM_SAVED',
TABLE_OWNER => 'SYSTEM'
);
end;
/
select SIGNATURE,SQL_HANDLE,SQL_TEXT,PLAN_NAME,ORIGIN,ENABLED,ACCEPTED,FIXED,AUTOPURGE,LAST_EXECUTED,LAST_MODIFIED from dba_sql_plan_baselines;
注：大部分內容出自：羅敏 <<感悟oracle核心技術>>
注：大部分內容出自：羅敏 <<感悟oracle核心技術>>
來自 “ ITPUB部落格 ” ，連結：http://blog.itpub.net/28572479/viewspace-2140791/，如需轉載，請註明出處，否則將追究法律責任。
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