如何创建SQL 调优集（—） 从共享池加载
1）创建一个新的SQL 调优集，新创建的调优集是空的，后面需要把SQL STATEMENT加载进来
exec dbms_sqltune.create_sqlset(sqlset_name=>'vodka_set');
2）从共享池加载SQL 调优集
DECLARE
cur DBMS_SQLTUNE.SQLSET_CURSOR;
BEGIN
OPEN cur FOR
SELECT VALUE(P)
FROM table(DBMS_SQLTUNE.SELECT_CURSOR_CACHE('PARSING_SCHEMA_NAME=''VODKA'' and force_matching_signature<>0 and BUFFER_GETS>1000 and EXECUTIONS>100 and command_type<>2',
NULL,
NULL,
NULL,
NULL,
1,
NULL,
'ALL')) P;
DBMS_SQLTUNE.LOAD_SQLSET(sqlset_name => 'vodka_set',
populate_cursor => cur);
END;
/
DBMS_SQLTUNE.SELECT_CURSOR_CACHE的第一个参数指定了要加载SQL的属性：SQL是由VODKA 用户产生的，签名不包含0的，BUFFER_GETS(总）大于1000的，执行次数（总）大于100的，命令类型不为INSERT的SQL都添加到调优集VODKA_SET里。
有两个参数值得特别说明：
1）SELECT_CURSOR_CACHE的第一个参数是basic_filter ，它可以取的值有：
sql_id VARCHAR(13),
force_matching_signature NUMBER,
sql_text CLOB,
object_list sql_objects,
bind_data RAW(2000),
parsing_schema_name VARCHAR2(30),
module VARCHAR2(48),
action VARCHAR2(32),
elapsed_time NUMBER,
cpu_time NUMBER,
buffer_gets NUMBER,
disk_reads NUMBER,
direct_writes NUMBER,
rows_processed NUMBER,
fetches NUMBER,
executions NUMBER,
end_of_fetch_count NUMBER,
optimizer_cost NUMBER,
optimizer_env RAW(1000),
priority NUMBER,
command_type NUMBER,
first_load_time VARCHAR2(19),
stat_period NUMBER,
active_stat_period NUMBER,
other CLOB,
plan_hash_value NUMBER,
sql_plan sql_plan_table_type,
bind_list sql_binds
2）SELECT_CURSOR_CACHE的最后一个参数是attribute_list
-
BASIC (default) -all attributes (such as execution statistics and binds) are returned except the plans The execution context is always part of the result.
-
TYPICAL - BASIC + SQL plan (without row source statistics) and without object reference list
-
ALL - return all attributes
-
Comma separated list of attribute names this allows to return only a subset of SQL attributes: EXECUTION_STATISTICS, BIND_LIST, OBJECT_LIST, SQL_PLAN,SQL_PLAN_STATISTICS: similar to SQL_PLAN + row source statistics
来自 “ ITPUB博客 ” ，链接：http://blog.itpub.net/22034023/viewspace-708257/，如需转载，请注明出处，否则将追究法律责任。
转载于:http://blog.itpub.net/22034023/viewspace-708257/