Hi all,

haven't found any useful information on this topic neither in the docs nor 
in the list archive, though I am sure the answer has been given before...

How does SPECTRUM calculate the CPU load that is compared to the threshold 
given in a devices's "threshold and watches" configuration section in case 
there are more than one CPUs involved? I have done some testing and got a 
pretty confusing impression: SPECTRUM takes the highest load of all CPUs 
and takes this as a value to test against the threshold, the resulting 
event shows the name of the system's first CPU found in the RFC 2790 MIB 
and the load compared to the threshold (which is in fact not necessarity 
the displayed CPU's load).

If this is the case, wouldn't it make much more sense, if anything 
nowadays with all the multithread applications spreading their load over 
several CPUs, to have a choice to let the overall CPU load be calculated 
as a sum of total percent and normalize it to a comparable value by 
dividing by 4?!


Now:

CPU0: 0%
CPU1: 10%
CPU2: 50%
CPU3: 30%
Threshold: 40%

-> Alarm for 50% load on CPU0 (!)


Wish:

same as above, but

Overall load: (0+10+50+30) / 4 =  22.5 %

-> No Alarm, as 22.5% < 40%


Am I confused? Or, worse,confusing?


Freundliche Grüße

Christian Fieres

Mainova AG
Sachgebiet Netz- und Infrastruktur (M3-ST4)
Teamleiter Service Operation Center
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