Managing processor resources dynamically
You can dynamically add, remove, and move processor resources to and from running logical partitions using the Hardware Management Console (HMC). This allows you to adjust the processor resources allocated to each logical partition without having to shut down the logical partitions.
The ability to move processor resources dynamically becomes important when you need to adjust to changing workloads. Processor resources can be moved based on the minimum and maximum values that you created for the partition profile. You can move processor resources as long as the processor resources for each logical partition remains within the range specified by the minimum and maximum values for the logical partition. If the managed system uses more than one shared processor pool, you must also ensure that the number of processors used in each shared processor pool is less than or equal to the maximum number of processing units specified for each shared processor pool.
- If resources are moved dynamically, the configuration change is temporary and is not reflected in the partition profile. This means that all configuration changes will be lost the next time the partition profile is activated. If you want to save your new logical partition configuration, either change the partition profile or save the logical partition configuration to a new partition profile.
- When dynamic logical partitioning tasks to add, remove, or move processor resources are run concurrently for a logical partition, the logical partition might not have the expected number of processor resources after the concurrent tasks are complete. The logical partition might not have the expected number of processor resources whether you specify the number of processor resources that you want the logical partition to have after the dynamic logical partitioning task is complete, or you specify the number of processor resources to be added to, removed from, or moved to or from the logical partition.