
Appendix B. Performance concepts 389
Figure B-7 LPARs’ network hierarchy
Performance metrics
We prefer to call the computer performance metrics “utilization metrics” because they mainly
measure the utilization of a particular resource. We refer to the output that the computer
actually delivers as “
performance metrics”. The utilization metrics of computer systems are
mainly measured through the use of analysis tools.
The following high-level overview shows the major performance metrics for various system
components:
CPU:
– %user, %system, %idle, and %wait
– Physical consumed, entitlement
– Number of context switches, interrupts, and system calls ...