Skip Headers

Oracle® Database Reference
10g Release 1 (10.1)

Part Number B10755-01
Go to Documentation Home
Home
Go to Book List
Book List
Go to Table of Contents
Contents
Go to Index
Index
Go to Master Index
Master Index
Go to Feedback page
Feedback

Go to previous page
Previous
Go to next page
Next
View PDF

PARALLEL_INSTANCE_GROUP

Property Description
Parameter type String
Syntax PARALLEL_INSTANCE_GROUP = group_name
Default value A group consisting of all instances currently active
Modifiable ALTER SESSION, ALTER SYSTEM
Range of values Any group name specified in the INSTANCE_GROUPS parameter of any active instance
Real Application Clusters Multiple instances can have different values.

PARALLEL_INSTANCE_GROUP is a Real Application Clusters parameter that you can specify in parallel mode only. Used in conjunction with the INSTANCE_GROUPS parameter, it lets you restrict parallel query operations to a limited number of instances.

This parameter identifies the parallel instance group Oracle will use for spawning parallel execution processes. Parallel operations will spawn parallel execution processes only on instances that specify a matching group in their INSTANCE_GROUPS parameter.

If the value of PARALLEL_INSTANCE_GROUP does not correspond to an instance group name specified for an active instance, Oracle returns an error.


See Also:

Oracle Real Application Clusters Administrator's Guide for more information on parallel query execution in a Real Application Clusters environment