Processor utilization question.

Post #79,029 by mmoffitt 2/3/03 6:46:04 PM Reply	Processor utilization question. Is it true, as I've been told, that a single processor ISeries AS/400 will always show 100% CPU utilization?
Post #79,083 by slugbug 2/3/03 10:25:40 PM Reply	RE: Processor utilization question Not unless its really overloaded :-) CPU utilization will flux based upon workload. The typical recommendation per processor is to run at a average of 70% CPU. Do a 'wrksyssts' or 'wrksysact' for more info.
Post #79,096 by boxley 2/3/03 11:19:16 PM Reply	In a Solaris environment at 70% I am looking to replace 70% peaks with 55 average starts me looking around to grow the system. Maybe not the most efficient plan but 70-100 goes really quick. In the AS400 arena it is different? thanx, bill will work for cash and other incentives [link\|http://home.tampabay.rr.com/boxley/resume/Resume.html\|skill set] questions, help? [link\|mailto:pappas@catholic.org\|email pappas at catholic.org]
Post #79,382 by slugbug 2/4/03 10:22:00 PM Reply	RE: In a Solaris environment at 70% I am looking to replace 70-100 does not seem to go as quickly on an OS/400 box versus Solaris.....my guess is that the MI layer is handling work management tasks very cleanly. Also, most AS400 models have ranges where you can expand CPUs/memory/disk without having to swap out physical hardware unless you reach max for that range. In the SPARC environment, you'd likely have to swap physical hardware out for a new model much sooner.
Post #79,384 by boxley 2/4/03 10:23:26 PM Reply	thanx for the insight, appreciated will work for cash and other incentives [link\|http://home.tampabay.rr.com/boxley/resume/Resume.html\|skill set] questions, help? [link\|mailto:pappas@catholic.org\|email pappas at catholic.org]
Post #79,327 by mmoffitt 2/4/03 7:11:23 PM Reply	Thank you. That makes sense. My client (of prior post's fame ;0) has told me many times that the 400 "always uses 100% of the processor, even if no jobs are running." I found that remarkable. The next time I'm in their shop, I'll try the commands you gave me. Thanks again. bcnu, Mikem
Post #79,347 by SpiceWare 2/4/03 8:23:20 PM Reply	maybe the throttling confused them? The company I used to work for migrated from Wang VS to AS/400. On the Wang, if you were the only user, you got the full load. I noticed on the AS/400 that even if you were the only user, you never got the full capacity of the machine. My guess is it works like that to make performance more "consistant" for the average user. On the Wang we'd get calls in the afternoon about slow performance, but never on the AS/400 - the performance drop wasn't as noticeable. Darrell Spice, Jr. [link\|http://www.spiceware.org/\|SpiceWare] - We don't do Windows, it's too much of a chore
Post #79,376 by ChrisR 2/4/03 9:50:04 PM Reply	I'm no expert... ...but I vaguely recall that OS/400 is Object based - probably implying that it has garbage collection like mechanisms. It's possible that the OS/400 tries to schedule such house-cleaning chores while nothing else is going on.
Post #79,385 by slugbug 2/4/03 10:28:22 PM Reply	RE: I'm no expert... Yes, OS400 is object-based. It does do garbage collection like activities, but it does so with or without workload.

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