11.3-RELEASE collectd transmits absurd values for CPU temperature

[Patrick M. Hausen]

Hi all,

some complaints about the dismissal of Netdata in 11.3 and finally this post:

graphite not exposing all stats?

Hello... I've successfully installed a graphite server using influxDB and Grafana, and I've started pushing data from an 11.2-U5 server. I am able to create a few graphs, and I am happy about it. However, I noticed that not all the information that is presented in the built-in graphs are...

www.ixsystems.com

sparked my interest in graphing solutions again. I have Influxdb and Grafana running, Influx with a Graphite compatible ingest port, and my FreeNAS sending data to it. So far so good.

About the only metric that is decidedly weird is CPU temperature. I get values around 3.300 units of whatever for each CPU core. Does anyone know the correct scaling formula to get to degrees centigrade? Division by 10 and the subtraction of 273 would get a roughly correct result for my idle machine but that is just wild guesswork.
And I could not find any documentation on this.

So all hints most welcome - thanks!
Patrick

 

[Dariusz1989]

Rool back to 11.2 and use netData or wait for plugin to get released.

 

[Patrick M. Hausen]

I'm trying to develop a plugin ...

 

[styno]

Rool back to 11.2 and use netData or wait for plugin to get released.

Don't be silly. For someone so heavily focussed on stats you surely appreciate every initiative taken in that direction.

A while ago I played with sexigraf as they had their FreeNas backend figured out.
(http://www.sexigraf.fr/freenas-sexipanel/). A grafana based solution is surly superior to netdata in terms of historical performance issue hunting.

 

[Damianos]

... Division by 10 and the subtraction of 273 would get a roughly correct result for my idle machine but that is just wild guesswork.

So all hints most welcome - thanks!
Patrick

Your guess is correct. The cpu temperature stat from middleware is provided as deci kelvin.

 

[Patrick M. Hausen]

Thanks for confirming. Do you happen to know how frequently data gets written?