6.7 Dynamic logical partitionsUsing dynamic logical partitions (DLPARs) involves the ability to move system resources (for instance, memory and processors) among partitions without requiring a reboot. These changes in resources are transparent to Java, but you should use care if resources are being removed.
Attention: If WebSphere is running on a partition with a single processor allocated and it is known that additional processor capacity will never be dynamically added, performance may be improved by exporting the following environment variable: export NO_LPAR_RECONFIGURATION=1.