Joseph, list, thanks to Scott Adler and Curtis Kellogg I now know it is possible to change the behaviour from having a single CPU instance alarmed to averaging all loads and alarm based on this - however, only on a global basis. I should have looked there myself in the first place as it was the place I would have had a look at to at least have seperate alarms for all affected CPU instances generated instead of only one alarm regardless how many CPUs are actually overloaded: An EventDisp file. (For the sake of completeness, it seems that in fact there is no discriminator defined that would, if present, have more than one alarm raised in case multiple CPUs' loads exceed the threshold.)
Have a look at https://communities.ca.com/thread/241700008 for the details. Thanks again guys for your help, and yes, Joseph, I agree with you regarding processes that lock a single CPU and themselves as a consequence, so I will have a little chat with our server guys as to which way to monitor their machines suits them best. Freundliche Grüße Christian Fieres Mainova AG Sachgebiet Netz- und Infrastruktur (M3-ST4) Teamleiter Service Operation Center Solmsstraße 38 60623 Frankfurt am Main Telefon 069 213 23617 Mobil 0170 5601563 Telefax 069 213 9623617 E-Mail [email protected] Internet http://www.mainova.de Von: Joseph POUTRE <[email protected]> An: "spectrum" <[email protected]>, Datum: 08.07.2015 14:53 Betreff: RE: [spectrum] CPU load calculation on multi CPU machines Greetings, Not all processes are multithreaded. I know we have software that uses a single CPU on a system, and can end up using all 100% and thus choking itself. I do believe it is possible to look at overall CPU usage, averaged over all CPUs, and to not alarm, or at least ignore, if any individual CPU is over the threshold. I looked into this some time back, but do not recall the details. - Joseph Poutre| CIB | ITIP ? Production Tools and Efficiency AVP 525 Washington Jersey City Off:+1 (201) 850-4179 Cel:+1 (201) 920-6632 [email protected] From: [email protected] [mailto:[email protected]] Sent: Wednesday, July 08, 2015 7:55 AM To: [email protected] Subject: [spectrum] CPU load calculation on multi CPU machines 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 Solmsstraße 38 60623 Frankfurt am Main Telefon 069 213 23617 Mobil 0170 5601563 Telefax 069 213 9623617 E-Mail [email protected] Internet http://www.mainova.de Mainova Aktiengesellschaft - Solmsstraße 38 - D-60623 Frankfurt am Main Vorsitzender des Aufsichtsrates: Stadtkämmerer Uwe Becker Vorstand: Dr. Constantin H. Alsheimer (Vorsitzender), Norbert Breidenbach, Lothar Herbst Sitz der Aktiengesellschaft: Frankfurt am Main - Amtsgericht Frankfurt HRB 7173 - USt-IdNr. DE 114184034 Mainova steht für besten Service, faire Verträge und top Preise für Ihre Energie - mit Auszeichnung! Mehr Infos unter: http://www.mainova.de/auszeichnung --To unsubscribe from spectrum, send email to [email protected] with the body: unsubscribe spectrum [email protected] This message and any attachments (the "message") is intended solely for the addressees and is confidential. 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