Memory considerations

There are several issues to consider when dealing with memory.

Partitions are defined with a "must have", a "desired", and a "minimum" amount of memory. When you are assessing changing performance conditions across system reboots, it is important to know that memory and CPU allocations might change based on the availability of the underlying resources. Also, remember that the amount of memory allocated to the partition from the HMC is the total amount allocated. Within the partition itself, some of that physical memory is used for hypervisor-page-table-translation support.

Memory is allocated by the system across the system. Applications in partitions cannot determine where memory has been physically allocated.