December 2001
Intermediate to advanced
506 pages
10h 4m
English
book
IBM eServer Certification Study Guide - pSeries AIX System Administration
by Christian Pruett, Kristian Strickland, Scott Vetter
Content preview from IBM eServer Certification Study Guide - pSeries AIX System Administration
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12.5. Performance analysis
In this section, system performance is analyzed to determine whether a system is CPU bound or memory bound. There is also a discussion on the idle time for Symmetric Multiprocessors (SMP) and Uniprocessor (UP) systems.
The following are some terms used during this discussion.
| CPU bound | A system is said to be CPU-bound if the total system (sy) and user (us) CPU usage is approaching 100 percent. This would imply that idle time and wait time for CPU are approaching zero. |
| Memory bound | A system is memory-bound if some virtual memory is forced out to disk, meaning the system is waiting on a relatively slow disk instead of relatively fast RAM. This is indicated by a non-zero value in the page-in (pi) and page-out (po) values. ... |
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