2026-03-12 21:01:38

tiddlywiki/Oracle resource manager example.md

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+> [Original article](https://oracle-base.com/articles/8i/resource-manager-8i)
+
+Create application users:
+
+	create user web_user identified by "iN_j8sC#d!kX6b:_";
+	create user batch_user identified by "r~65ktuFYyds+P_X";
+	grant connect,resource to web_user;
+	grant connect,resource to batch_user;
+
+
+Create a pending area:
+
+	BEGIN
+		DBMS_RESOURCE_MANAGER.clear_pending_area;
+		DBMS_RESOURCE_MANAGER.create_pending_area;
+	END;
+	/
+
+
+Create a plan:
+
+	BEGIN
+		DBMS_RESOURCE_MANAGER.create_plan(
+			plan    => 'hybrid_plan',
+			comment => 'Plan for a combination of high and low priority tasks.');
+	END;
+	/
+
+
+Create a web and a batch consumer group:
+
+	BEGIN
+		DBMS_RESOURCE_MANAGER.create_consumer_group(
+			consumer_group => 'WEB_CG',
+			comment        => 'Web based OTLP processing - high priority');
+
+		DBMS_RESOURCE_MANAGER.create_consumer_group(
+			consumer_group => 'BATCH_CG',
+			comment        => 'Batch processing - low priority');
+	END;
+	/
+
+
+Assign the consumer groups to the plan and indicate their relative priority, remembering to add the OTHER_GROUPS plan directive:
+
+
+	BEGIN
+		DBMS_RESOURCE_MANAGER.create_plan_directive (
+			plan                     => 'hybrid_plan',
+			group_or_subplan         => 'web_cg',
+			comment                  => 'High Priority',
+			cpu_p1                   => 80,
+			cpu_p2                   => 0,
+			parallel_degree_limit_p1 => 4);
+
+		DBMS_RESOURCE_MANAGER.create_plan_directive (
+			plan                     => 'hybrid_plan',
+			group_or_subplan         => 'batch_cg',
+			comment                  => 'Low Priority',
+			cpu_p1                   => 0,
+			cpu_p2                   => 80,
+			parallel_degree_limit_p1 => 4);
+
+		DBMS_RESOURCE_MANAGER.create_plan_directive(
+			plan             => 'hybrid_plan',
+			group_or_subplan => 'OTHER_GROUPS',
+			comment          => 'all other users - level 3',
+			cpu_p1           => 0,
+			cpu_p2           => 0,
+			cpu_p3           => 100);
+	END;
+	/
+
+
+Validate and apply the resource plan:
+
+	BEGIN
+		DBMS_RESOURCE_MANAGER.validate_pending_area;
+		DBMS_RESOURCE_MANAGER.submit_pending_area;
+	END;
+	/
+
+
+Assign our users to individual consumer groups:
+
+	BEGIN
+		-- Assign users to consumer groups
+		DBMS_RESOURCE_MANAGER_PRIVS.grant_switch_consumer_group(
+			grantee_name   => 'web_user',
+			consumer_group => 'web_cg',
+			grant_option   => FALSE);
+
+		DBMS_RESOURCE_MANAGER_PRIVS.grant_switch_consumer_group(
+			grantee_name   => 'batch_user',
+			consumer_group => 'batch_cg',
+			grant_option   => FALSE);
+
+		DBMS_RESOURCE_MANAGER.set_initial_consumer_group('web_user', 'web_cg');
+
+		DBMS_RESOURCE_MANAGER.set_initial_consumer_group('batch_user', 'batch_cg');
+	END;
+	/
+
+
+Connect users:
+
+	connect web_user/"iN_j8sC#d!kX6b:_"
+	connect batch_user/"r~65ktuFYyds+P_X"
+
+Check `resource_consumer_group` column in `v$session`:
+
+SELECT username, resource_consumer_group 
+	FROM   v$session
+	WHERE  username IN ('WEB_USER','BATCH_USER');
+
+Note that the value change for a connecte session if `RESOURCE_MANAGER_PLAN` change at instance level:
+
+	alter system set RESOURCE_MANAGER_PLAN = 'hybrid_plan' scope=both sid='*';
+	alter system set RESOURCE_MANAGER_PLAN = '' scope=both sid='*';