Oracle® Database Reference 10g Release 1 (10.1) Part Number B10755-01 |
|
|
View PDF |
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 |