1. Database Reference
  2. Initialization Parameters
  3. Initialization Parameters
  4. RESOURCE_MANAGER_PLAN

1.301 RESOURCE_MANAGER_PLAN

RESOURCE_MANAGER_PLAN specifies the resource plan to use for a database (CDB or non-CDB).

Property Description

Parameter type

String

Syntax

RESOURCE_MANAGER_PLAN = resource_plan_name

Default value

There is no default value.

Modifiable

ALTER SYSTEM

Modifiable in a PDB

Yes

Range of values

Any valid character string

Basic

No

In a CDB

In the root for a CDB, RESOURCE_MANAGER_PLAN specifies the CDB resource plan. A CDB resource plan allocates resources among PDBs.

A CDB resource plan is created using DBMS_RESOURCE_MANAGER.CREATE_CDB_PLAN and CREATE_CDB_PLAN_DIRECTIVE.

See Also:

A session must be root to change the value of RESOURCE_MANAGER_PLAN for a CDB using the ALTER SYSTEM statement. For example, to enable and disable a CDB resource plan: 

SQL> ALTER SYSTEM SET RESOURCE_MANAGER_PLAN = CDB_resource_plan_name;
SQL> ALTER SYSTEM SET RESOURCE_MANAGER_PLAN = '';

In a PDB, RESOURCE_MANAGER_PLAN specifies the PDB resource plan to use for the PDB.

A session must be in the PDB to enable or disable a PDB resource plan for that PDB. For example, to enable and disable a PDB resource plan:

SQL> ALTER SYSTEM SET RESOURCE_MANAGER_PLAN = PDB_resource_plan_name;
SQL> ALTER SYSTEM SET RESOURCE_MANAGER_PLAN = '';

In a PDB, the PDB resource plan has some restrictions compared to the resource plan of a non-CDB. The following restrictions apply to PDB resource plans:

  • A PDB resource plan cannot have subplans.

  • A PDB resource plan can have a maximum of eight consumer groups.

  • A PDB resource plan cannot have a multiple-level scheduling policy.

To enforce certain PDB resource plan policies, policies regarding resource allocation among PDBs should exist in the CDB resource plan. Without a CDB resource plan, certain PDB resource plan policies will not be enforced. If a PDB resource plan contains CPU or parallel statement queuing directives and a CDB resource plan is not specified, then Resource Manager will automatically enable the DEFAULT_CDB_PLAN plan. To prevent this behavior, set the RESOURCE_MANAGER_PLAN parameter at the root level to ORA$INTERNAL_CDB_PLAN.

Note:

See Oracle Multitenant Administrator's Guide for information on CPU, I/O bandwidth, and parallel execution servers requirements in CDB resource plans, and for a description of the results in the PDB resource plans when those requirements are not met.

In a Non-CDB

RESOURCE_MANAGER_PLAN specifies the top-level resource plan to use for an instance in a non-CDB. The resource manager will load this top-level resource plan along with all its descendants (subplans, directives, and consumer groups). If you do not specify this parameter, the resource manager is off by default.

You can change the setting of this parameter using the ALTER SYSTEM statement to turn on the resource manager (if it was previously off) or to turn off the resource manager or change the current resource plan (if it was previously on). If you specify a resource plan that does not exist in the data dictionary, Oracle returns an error message.

See Also: