Special Considerations
Instant Capacity Compatibility with Processor Sets
With vPars version A.04.01 or greater, vPars is Pset-aware to an extent. When adding processors to a running vPar, a processor is always added to the default Pset; thereafter, it may be moved to another Pset. When removing processors, vparmodify will choose processors from the default Pset first, and if not enough exist in the default Pset to satisfy the request, vparmodify chooses the remaining processors arbitrarily, without regard to Pset membership.
With vPars versions less than A.04, no special consideration is given to Psets from the vparmodify command’s perspective. Therefore, when using vPars, processors in non-default Psets must be bound processors. Otherwise, a processor designated for deactivation by vparmodify may be selected from an unexpected Pset.
