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

1.44 CLUSTER_DATABASE_INSTANCES

CLUSTER_DATABASE_INSTANCES is an Oracle RAC parameter that specifies the number of instances that are configured as part of the cluster database.

Property Description

Parameter type

Integer

Default value

If CLUSTER_DATABASE is set to false, then 1

If CLUSTER_DATABASE is set to true, the number of configured Oracle RAC instances

Modifiable

No

Modifiable in a PDB

No

Range of values

Any nonzero value

Basic

No

Oracle RAC

Multiple instances should have the same value.

You must set this parameter for every instance. Normally you should set this parameter to the number of instances in your Oracle RAC environment. A proper setting for this parameter can improve memory use.

Note:

The CLUSTER_DATABASE_INSTANCES parameter is deprecated in Oracle Database release 19c, version 19.1, and may be desupported in a future release. Starting with Oracle Database release 19c, version 19.1, the number of configurable Oracle RAC instances is derived from Oracle Clusterware.

See Also: