Glossary

Shared processor pool

On IBM Power, the processors that are not dedicated to a partition form a shared processor pool, and some models allow additional pools with an optional maximum and reserve. Capacity is counted in processing units. A capped partition stays within its allocation, while an uncapped one can exceed it, up to its virtual processors and the pool maximum.

XorMon

How XorMon monitors it

✓XorMon graphs the shared CPU pool with these metrics: Max (maximum available for the pool, a configuration parameter), Allocated (CPUs available in the server for CPU sharing), LPAR Entitled (entitled CPU summed over all LPARs in the pool), Reserved (CPU reserved in the pool configuration) and Phys (CPU physical usage).
✓The documentation gives two examples: when Max equals Allocated, there are CPU resources for the shared pools; when Max is higher than Allocated, only the allocated CPUs (7 in the example) are available to them.
✓CPU metrics are available at LPAR, server and shared CPU pool level.
✓The Resource Configuration Advisor checks the CPU, memory and IO setup of all LPARs and CPU pools against their utilization history.

XorMon documentation: IBM Power CPU monitoring

Shared processor pool

How XorMon monitors it

Related terms

Sources