Oracle DBMS_RESOURCE_MANAGER 用法例子

General

Note: Resource Manager requires a massive over-demand on CPU before the expected behavior starts to show: Generally speaking a 300% or 400% CPU load to see that the actual split gets closer to expectation, with the lower-privileged processes losing time in a wait state whose name includes 'resmgr: ....{something}..'

Source

{ORACLE_HOME}/rdbms/admin/dbmsrmad.sql

First Available

8.1.5

Consumer Group Mapping Constants

Name	Data Type	Value
client_machine	VARCHAR2(30)	'CLIENT_MACHINE'
client_os_user	VARCHAR2(30)	'CLIENT_OS_USER'
client_program	VARCHAR2(30)	'CLIENT_PROGRAM'
module_name	VARCHAR2(30)	'MODULE_NAME'
module_name_action	VARCHAR2(30)	'MODULE_NAME_ACTION'
oracle_user	VARCHAR2(30)	'ORACLE_USER'
performance_class	VARCHAR2(30)	'PERFORMANCE_CLASS'
service_module	VARCHAR2(30)	'SERVICE_MODULE'
service_module_action	VARCHAR2(30)	'SERVICE_MODULE_ACTION'
service_name	VARCHAR2(30)	'SERVICE_NAME'

 

Consumer Group Mapping Constants

Name	Data Type	Value
client_machine	VARCHAR2(30)	'CLIENT_MACHINE'
client_os_user	VARCHAR2(30)	'CLIENT_OS_USER'
client_program	VARCHAR2(30)	'CLIENT_PROGRAM'
module_name	VARCHAR2(30)	'MODULE_NAME'
module_name_action	VARCHAR2(30)	'MODULE_NAME_ACTION'
oracle_user	VARCHAR2(30)	'ORACLE_USER'
service_module	VARCHAR2(30)	'SERVICE_MODULE'
service_module_action	VARCHAR2(30)	'SERVICE_MODULE_ACTION'
service_name	VARCHAR2(30)	'SERVICE_NAME'

 

CLEAR_PENDING_AREA
Clears the work area for the resource manager	dbms_resource_manager.clear_pending_area;
exec dbms_resource_manager.clear_pending_area ;

CREATE_PENDING_AREA
Creates a work area for changes to resource manager objects	dbms_resource_manager.create_pending_area;
See Demo

DELETE_CONSUMER_GROUP
Delete entries that define resource consumer groups	dbms_resource_manager.delete_consumer_group(consumer_group IN VARCHAR2);
See Demo
DELETE_PLAN
Deletes the specified plan as well as all the plan directives to which it refers	dbms_resource_manager.delete_plan(plan IN VARCHAR2);
exec dbms_resource_manager.delete_plan ('UW_PLAN');
DELETE_PLAN_CASCADE
Deletes the specified plan as well as well as its descendants (plan directives, subplans, consumer groups)	dbms_resource_manager.delete_plan_cascade(plan IN VARCHAR2);
See Demo
DELETE_PLAN_DIRECTIVE
Delete resource plan directives	dbms_resource_manager.delete_plan_directive( plan             IN VARCHAR2, group_or_subplan IN VARCHAR2);
See Demo
SET_CONSUMER_GROUP_MAPPING
Adds, deletes, or modifies entries that map sessions to consumer groups, based on the session's login and runtime attributes	dbms_resource_manager.set_consumer_group_mapping( attribute      IN VARCHAR2, value          IN VARCHAR2, consumer_group IN VARCHAR2 DEFAULT NULL);
TBD
SET_CONSUMER_GROUP_MAPPING_PRI
Creates the session attribute mapping priority list The highest priority is 1, the lowest 10 (the docs are incorrect)	dbms_resource_manager.set_consumer_group_mapping_pri( explicit              IN NUMBER, oracle_user           IN NUMBER, service_name          IN NUMBER, client_os_user        IN NUMBER, client_program        IN NUMBER, client_machine        IN NUMBER, module_name           IN NUMBER, module_name_action    IN NUMBER, service_module        IN NUMBER, service_module_action IN NUMBER);
desc dba_rsrc_mapping_priority SELECT * FROM dba_rsrc_mapping_priority; exec dbms_resource_manager.create_pending_area ; exec dbms_resource_manager.set_consumer_group_mapping_pri(1, 2, 3, 4, 5, 6, 7, 8, 9, 10); exec dbms_resource_manager.validate_pending_area ; exec dbms_resource_manager.submit_pending_area ; SELECT * FROM dba_rsrc_mapping_priority; exec dbms_resource_manager.create_pending_area ; exec dbms_resource_manager.set_consumer_group_mapping_pri(1, 7, 6, 9, 8, 10, 5, 4, 3, 2); exec dbms_resource_manager.validate_pending_area ; exec dbms_resource_manager.submit_pending_area ;
SET_INITIAL_CONSUMER_GROUP
Assigns the initial resource consumer group for a user: Obsolete	dbms_resource_manager.set_initial_consumer_group( user           IN VARCHAR2, consumer_group IN VARCHAR2);
Deprecated
SUBMIT_PENDING_AREA
Submits pending changes for the resource manager	dbms_resource_manager.submit_pending_area;
See Demo
SWITCH_CONSUMER_GROUP_FOR_SESS
Changes the resource consumer group of a specific session	dbms_resource_manager.switch_consumer_group_for_sess( session_id     IN NUMBER, session_serial IN NUMBER, consumer_group IN VARCHAR2);
SELECT username, initial_rsrc_consumer_group FROM dba_users ORDER BY 1; col schemaname format a15 col program format a20 SELECT sid, serial#, schemaname, osuser, program FROM gv$session WHERE service_name NOT LIKE '%BACK%'; exec dbms_resource_manager.switch_consumer_group_for_sess (147, 1883, 'SYS_GROUP'); SELECT username, initial_rsrc_consumer_group FROM dba_users ORDER BY 1; exec dbms_resource_manager.switch_consumer_group_for_sess (147, 1883, 'DEFAULT_CONSUMER_GROUP');
SWITCH_CONSUMER_GROUP_FOR_USER
Changes the resource consumer group for all sessions with a given user name	dbms_resource_manager.switch_consumer_group_for_user( user           IN VARCHAR2, consumer_group IN VARCHAR2);
exec dbms_resource_manager.switch_consumer_group_for_user ( 'UWCLASS', 'rpt_writers_grp');
SWITCH_PLAN
Sets the current resource manager plan	dbms_resource_manager.switch_plan( plan_name                     IN VARCHAR2, sid                           IN VARCHAR2 DEFAULT '*', allow_scheduler_plan_switches IN BOOLEAN DEFAULT TRUE);
TBD

VALIDATE_PENDING_AREA
Validates pending changes for the resource manager	dbms_resource_manager.validate_pending_area;
See Demo
Demos
Create Plan 1 Demonstration	conn / as sysdba desc dba_users SELECT username, initial_rsrc_consumer_group FROM dba_users ORDER BY 1; GRANT select ON dba_rsrc_consumer_groups TO uwclass; -- create pointy-haired boss user CREATE USER phb IDENTIFIED BY phb DEFAULT TABLESPACE uwdata TEMPORARY TABLESPACE temp QUOTA 1M ON uwdata; GRANT create session TO phb; SELECT username, initial_rsrc_consumer_group FROM dba_users ORDER BY 1; desc dba_rsrc_consumer_group_privs SELECT * FROM dba_rsrc_consumer_group_privs; set linesize 121 col plan format a30 col cpu_method format a10 col comments format a60 desc dba_rsrc_plans SELECT plan, cpu_method, comments, mandatory FROM dba_rsrc_plans; col cpu_method format a15 col consumer_group format a25 col comments format a45 desc dba_rsrc_consumer_groups SELECT * FROM dba_rsrc_consumer_groups; col value format a20 desc dba_rsrc_group_mappings SELECT * FROM dba_rsrc_group_mappings; exec dbms_resource_manager_privs.grant_system_privilege ('UWCLASS', 'ADMINISTER_RESOURCE_MANAGER', FALSE); conn uwclass/uwclass -- create a pending area exec dbms_resource_manager.create_pending_area ; -- create two consumer groups: Workers and Managers exec dbms_resource_manager.create_consumer_group ('Workers', 'Those that do actual work'); exec dbms_resource_manager.create_consumer_group ('Managers', 'Those that don''t but take all the credit'); SELECT * FROM dba_rsrc_consumer_groups; exec dbms_resource_manager.update_consumer_group ('Managers', 'The Cartesian products of the IT world'); SELECT * FROM dba_rsrc_consumer_groups; -- create resource management plan exec dbms_resource_manager.create_plan ('UW_PLAN','Demo Resource Plan', 'RATIO'); -- create plan directives exec dbms_resource_manager.create_plan_directive (plan=>'UW_PLAN', group_or_subplan=>'Workers', comment=>'Can Grab All The CPU', cpu_p1=>100); exec dbms_resource_manager.create_plan_directive (plan=>'UW_PLAN', group_or_subplan=>'Managers', comment=>'Give Managers Little Weight', cpu_p1=>1); -- validate the pending area exec dbms_resource_manager.validate_pending_area ; exec dbms_resource_manager.create_plan_directive (plan=>'UW_PLAN', group_or_subplan=>'OTHER_GROUPS', comment=>'Testing', cpu_p2=>0); -- validate the pending area exec dbms_resource_manager.validate_pending_area ; -- oops ... go back and redo correctly -- delete plan directives exec dbms_resource_manager.delete_plan_directive ('UW_PLAN', 'Managers'); -- recreate plan directives exec dbms_resource_manager.create_plan_directive (plan=>'UW_PLAN', group_or_subplan=>'Managers', comment=>'Infinite Weight', cpu_p1=>0); -- revalidate the pending area exec dbms_resource_manager.validate_pending_area ; -- submit the pending area exec dbms_resource_manager.submit_pending_area ; SELECT plan, cpu_method, comments, status, mandatory FROM dba_rsrc_plans; SELECT * FROM dba_rsrc_consumer_groups; exec dbms_resource_manager_privs.grant_switch_consumer_group ( grantee_name=>'PHB', consumer_group=>'Managers', grant_option=>FALSE); exec dbms_resource_manager.set_initial_consumer_group (user => 'SCHEDULE', consumer_group=>'Managers'); alter system set resource_manager_plan = 'UW_PLAN'; conn schedule/schedule /* So PHB is in a group that should have no CPU. Does this mean PHB can't do anything? */ SELECT COUNT(*) FROM all_tables; /* PHB is fine. There's plenty of free CPU so even though the group that PHB group belongs to "looks" like it should have no CPU, that doesn't have any effect in this case. */
Create Plan 2 Demonstration	/* Resource Manager is only effective (from a CPU point of view) once CPU utilization starts to max out. Oracle takes the attitude that if there is spare CPU capacity, there is no need to limit usage. Only when the resource becomes scarce does Oracle restrict access. */ BEGIN -- create pending area dbms_resource_manager.create_pending_area ; dbms_resource_manager.create_plan (plan=>'TEST2', comment=>'Use 10g Feature'); dbms_resource_manager.create_plan_directive (plan=>'TEST2', group_or_subplan=>'HAVES', comment=>'Testing', cpu_p1=>100); dbms_resource_manager.create_plan_directive (plan=>'TEST2', group_or_subplan=>'NOTS', comment=>'Testing', cpu_p1=>0, max_est_exec_time=>0); /* Prevent the have Managers from running any operation that has an estimated execution time > 0. */ dbms_resource_manager.create_plan_directive (plan=>'TEST2', group_or_subplan=>'OTHER_GROUPS', comment=>'Testing', cpu_p2=>100); dbms_resource_manager.validate_pending_area ; dbms_resource_manager.submit_pending_area ; dbms_resource_manager_privs.grant_switch_consumer_group ( grantee_name=>'PHB', consumer_group=>'Managers', grant_option=>FALSE); dbms_resource_manager.set_initial_consumer_group (user => 'SCHEDULE', consumer_group=>'Managers'); END; / ALTER SYSTEM SET resource_manager_plan = test2; conn schedule/schedule SELECT COUNT(*) FROM huge_table; ERROR at line 1: ORA-07455: estimated execution time (56 secs), exceeds limit (0 secs) /* However, the problem here is that Oracle kinda rounds *down* the estimate execution time so providing I'm not being too greedy with my resources, Oracle can be a little lenient ... */ SELECT COUNT(*) FROM small_table;
Drop Plan Demonstration	conn / as sysdba -- create pending area exec dbms_resource_manager.create_pending_area ; -- remove admin privilege from uwclass exec dbms_resource_manager_privs.revoke_system_privilege ( 'UWCLASS', 'ADMINISTER_RESOURCE_MANAGER'); -- delete resource plan exec dbms_resource_manager.delete_plan_cascade ('UW_PLAN'); -- validate pending area exec dbms_resource_manager.validate_pending_area ; SELECT username, initial_rsrc_consumer_group FROM dba_users ORDER BY 1; -- switch consumer group for user SCHEDULES exec dbms_resource_manager.switch_consumer_group_for_user ( 'SCHEDULE', 'DEFAULT_CONSUMER_GROUP'); BEGIN dbms_resource_manager.create_pending_area ; dbms_resource_manager.delete_plan_cascade ('UW_PLAN'); dbms_resource_manager.validate_pending_area ; END; / -- submit pending area exec dbms_resource_manager.submit_pending_area ; -- revoke system privilege from user exec dbms_resource_manager_privs.revoke_system_privilege ('UWCLASS');

 

参考至：http://hi.baidu.com/edeed/blog/item/33c6b901c36b3a07728da521.html

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