Glossary

LPAR (logical partition)

A logical partition (LPAR) lets one physical IBM Power server run as several independent servers. Its processors, memory and I/O devices are split into subsets, and each subset runs its own operating system and software. Supported operating systems are AIX, IBM i, Linux and the Virtual I/O Server, which provides virtual I/O to the other partitions.

XorMon

How XorMon monitors it

✓XorMon monitors IBM Power servers and their LPARs running AIX, VIOS, IBM i and Linux on Power, through the HMC REST API, and adds metrics from agents in the AIX, VIOS and Linux on Power LPARs.
✓CPU is graphed at LPAR, server and shared CPU pool level: CPU Phys (physical CPU allocated to the LPAR), CPU Usage (real OS level usage, the physical CPU minus the idle cycles), CPU Virtual (virtual CPUs allocated) and CPU Entitled (entitled CPU allocated).
✓For an LPAR in CPU dedicated mode with "keep idle procs", CPU Phys is equal to CPU Virtual and appears as a flat line in the graph.
✓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

LPAR (logical partition)

How XorMon monitors it

Related terms

Sources