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· May 11, 2017

Health Monitor: What is CPUPct Sensor Object meaning

#Monitoring #System Administration #Caché

Since most of our customers moved to Caché 2015.1, some admins became abused with CPUPct warnings (sometimes alerts) in console log without other signs of lacking CPU power.
Documentation states that:

          CPUPct              job_type             CPU usage (percent) by all processes of the listed job type in aggregate       

What does it really mean?
E.g., if total system CPU usage is 25%, and all running processes are of the same type (e.g, CSPSRV), would CPUPct be equal to 100%? If so, why this case should be a reason for alert? 

Checking the latest docs showed that the description of CPUPct was excluded from it, while the object still exists (at least in 2017.1.0).

PS. I know how to suppress these annoying messages, but wonder if there are some cases when they can be useful.

PPS. Appearance of these messages in logs was associated with upgrade to 2015.1 just because the previous version of Caché that we used was lacking Health Monitor facility.

Discussion (4)2
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Jon Sue-Ho · May 23, 2017

Привет, Алексей!

CPUPct is the percentage of CPU used (in aggregate) by jobs of particular predetermined “types.”  These types include categories like “ECPWorker”, “ECPCliR”,“ECPCliW”, or other ECP categories as well as things like “WRTDMN”, “JRNDMN”, and various mirror related categories.

Since this information is not necessarily useful and since some false positive alerts were being thrown because of problems in calculating this value, tracking and alerts of CPUPct was actually removed starting in 2016.1 with dev change SAP2016, so the next time you upgrade, you shouldn’t see these particular alerts anymore.  If there really is a problem with processes using resources on your system, it will be evident in other ways and can be investigated using other tools.  If you are still seeing these alerts in later versions, please open a WRC case to report it.

С уважением

Jon Sue-Ho

(Товарищ Сухов)

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Alexey Maslov · May 24, 2017
  • Вопросы есть? Вопросов нет!
  • И называйте меня просто — товарищ Сухов!
  • Have you any questions? No questions!
  • And call me simply - comrade Sukhov

Quotes from the cult film "White Sun of the Desert" / "Белое солнце пустыни", 1970.

This film is traditionally watched by Russian cosmonauts before every space flight.

PS. Sorry for off-topic, Jon provoked me :)

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