This field indicates the number of processing units that are reserved for temporary use by the uncapped logical partitions in the shared processor pool. A logical partition can use reserved processing units only when the logical partition is an uncapped logical partition that requires more than its assigned amount of processor resources. Reserved processing units cannot be used by logical partitions in other shared processor pools. Also, reserved processing units cannot be assigned to a specific logical partition.
The default shared processor pool does not have a reserved number of processing units, because the default shared processor pool automatically uses any processing units that are not used by the other shared processor pools.