Update a plan directive

You can call the UPDATE_PLAN_DIRECTIVE subprogram in the DBMS_RESOURCE_MANAGER package to update a plan directive based on business needs. You can update the resource management plan, bound resource group, CPU resources available for the resource group, and limit on the CPU resources available for the resource group.

Prerequisites

If you want to change the original resource management plan or resource group, make sure that you have created a new one. For more information, see Configure user-level resource isolation.

Procedure

1. Log on to an Oracle tenant in the cluster as the administrator of the tenant.

2. Call the UPDATE_PLAN_DIRECTIVE subprogram in the DBMS_RESOURCE_MANAGER package to update the plan directive.

   obclient [SYS]> delimiter //
   
   obclient [SYS]> BEGIN DBMS_RESOURCE_MANAGER.UPDATE_PLAN_DIRECTIVE(
   PLAN => 'plan_a',
   GROUP_OR_SUBPLAN => 'big_group',
   NEW_COMMENT => 'new'
   NEW_MGMT_P1 => 40,
   NEW_UTILIZATION_LIMIT => 60,
   NEW_MIN_IOPS => 20,
   NEW_MAX_IOPS  => 100,
   NEW_WEIGHT_IOPS  => 10);
   END ;//
   
   obclient [SYS]> delimiter ;
   

   where:

   • PLAN indicates the name of the new resource management plan.

   • GROUP_OR_SUBPLAN indicates the name of the new resource group.

   • NEW_COMMENT indicates the new comments on the plan directive.

   • NEW_MGMT_P1 indicates the new percentage of CPU resources available for the resource group when the system runs at full load.

   • NEW_UTILIZATION_LIMIT indicates the new upper limit on the CPU resources available for the resource group.

   • NEW_MIN_IOPS indicates the new IOPS resources reserved for the resource group in the case of I/O resource contention. The sum of NEW_MIN_IOPS values of all resource groups cannot exceed 100.

   • NEW_MAX_IOPS indicates the new maximum IOPS resources available for the resource group. The sum of NEW_MAX_IOPS values of all resource groups can exceed 100.

   • NEW_WEIGHT_IOPS indicates the new weight for IOPS resources. The sum of NEW_WEIGHT_IOPS values of all resource groups can exceed 100.

3. Query the DBA_RSRC_PLAN_DIRECTIVES or DBA_OB_RSRC_IO_DIRECTIVES view to verify whether the resource management is updated.

   obclient [SYS]> SELECT PLAN, GROUP_OR_SUBPLAN, MGMT_P1, UTILIZATION_LIMIT FROM DBA_RSRC_PLAN_DIRECTIVES;
   +--------+------------------+---------+-------------------+
   | PLAN   | GROUP_OR_SUBPLAN | MGMT_P1 | UTILIZATION_LIMIT |
   +--------+------------------+---------+-------------------+
   | PLAN_A | BIG_GROUP        |      40 |                60 |
   | PLAN_A | SMALL_GROUP      |      40 |                70 |
   +--------+------------------+---------+-------------------+
   2 rows in set
   
   obclient [SYS]> SELECT * FROM DBA_OB_RSRC_IO_DIRECTIVES;
   

   For more information about the DBA_RSRC_PLAN_DIRECTIVES view, see DBA_RSRC_PLAN_DIRECTIVES.

   For more information about the DBA_OB_RSRC_IO_DIRECTIVES view, see DBA_OB_RSRC_IO_DIRECTIVES.

References

UPDATE_PLAN_DIRECTIVE