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

1.156 INSTANCE_GROUPS

Used with the PARALLEL_INSTANCE_GROUP parameter, INSTANCE_GROUPS lets you restrict parallel query operations to a limited number of instances.

Property Description

Parameter type

String

Syntax

INSTANCE_GROUPS = group_name [, group_name ] ...

Default value

There is no default value.

Modifiable

No

Modifiable in a PDB

No

Range of values

One or more instance group names, separated by commas

Basic

No

Oracle RAC

Multiple instances can have different values.

Note:

The INSTANCE_GROUPS parameter is deprecated. It is retained for backward compatibility only.

INSTANCE_GROUPS is an Oracle RAC parameter that you can specify only in parallel mode.

This parameter specifies one or more instance groups and assigns the current instance to those groups. If one of the specified groups is also specified in the PARALLEL_INSTANCE_GROUP parameter, then Oracle allocates query processes for a parallel operation from this instance.

See Also: