Thold to monitor Average CPU?

[mikej1234]

Hello,

Has anyone been able to monitor the average CPU in Thold?

I have a server with 8 cores and have used an excellent graph template to monitor CPU0-7. It works as expected. Part of the graph shows a CDEF function to average the 8 cores and displays it as the mean CPU usage.

What i'm trying to figure out is how I can use Thold to trigger an alert if the mean CPU utilization is above a certain limit. Right now, by default, the threshold is created using CPU0 as the data source and I can't figure out how to make it use the CDEF function instead.

Any suggestions?

Thanks for your time,
Mike

[TheWitness]

Use RPN Expression Data Manipulation.

[colthe]

Use RPN Expression Data Manipulation.

because i am newer for "thold" and used cacti to monitor network traffics for a long time and work fine, I had enable the plugin "thold" with cacti 0.8.7h, Where can I find a manual for thold settings like CDEF/RPN etc, thanks inadvance.

[TheWitness]

When you create the Thold look for the words "Data Manipulation"....

[mikej1234]

Thanks for the reply.

When I create the threshold for the 8CPU graph I selected the data type as CDEF. Then below there is an option for a dropdown which has these entries:

Make Stack Negative
Make Per 5 Minutes
Turn Bytes into Bits
Multiply by 1024
Turn Bytes into Bits Negative
CPU Seconds as Percentage
Turn kilobytes into bits

Because THOLD is selecting CPU0 as the main datasource as default, I'd like to use the average CPU of all 8. When I look at the graph template I actually see a CDEF function called "Average All data sources - 8 sources".

How can I define this 8 source average as a CDEF for THOLD?

Thanks again for your time.

Mike

[TheWitness]

I would rather you do RPN Expression:

Code: Select all

|ds:cpu0|,|ds:cpu1|,|ds:cpu2|,|ds:cpu3|,|ds:cpu4|,|ds:cpu5|,|ds:cpu6|,|ds:cpu7|,+,+,+,+,+,+,+,8,/

TheWitness

[mikej1234]

Thanks for the reply regarding the RPN expression.

Could you give me a hand regarding its implementation? I'm not sure how to create the threshold CDEF with this value:

|ds:cpu0|,|ds:cpu1|,|ds:cpu2|,|ds:cpu3|,|ds:cpu4|,|ds:cpu5|,|ds:cpu6|,|ds:cpu7|,+,+,+,+,+,+,+,8,/

Thanks for your help.

Mike

[mikej1234]

Hi Witness,

Would you be able to give me a hand configuring the the string below?

|ds:cpu0|,|ds:cpu1|,|ds:cpu2|,|ds:cpu3|,|ds:cpu4|,|ds:cpu5|,|ds:cpu6|,|ds:cpu7|,+,+,+,+,+,+,+,8,/

I haven't been able to figure it out in Thold. I see the mean average in the graph, but I cannot chose it successfully in thold.

Thanks again for your help.

Mike