New Question
 
 
PRTG Network Monitor

Intuitive to Use.
Easy to manage.

200.000 administrators have chosen PRTG to monitor their network. Find out how you can reduce cost, increase QoS and ease planning, as well.

Free PRTG
Download >>

 

What is this?

This knowledgebase contains questions and answers about PRTG Network Monitor and network monitoring in general. You are invited to get involved by asking and answering questions!

Learn more

 

Top Tags


View all Tags


Compare values with previous reading and divide by time.

Votes:

0

Your Vote:

Up

Down

Hi, I'm sorry that I'm quite new to the prtg and learning how to use it, I hope my question not a silly one...

I have a device use custom OID which contains an accumulative value(Volume of network traffic in bytes for every 30 seconds), the device OID is not standard and it don't have a uptime oid, therefore the delta (counter) option is not possible to use with that device.

The action I trying to do is "take the current value from the OID(e.g. 1.3.6.1.1.1.1.1.1.1)", subtract the last value of the sensor channel receive from same OID, and divide by 30 seconds. and finally display the calculated result. and also discarding the calculated result if it is lower than "0".

The calculation is: (Current OID value(save it in a "Gauge(signed integer)") - (Last OID value) / (30 seconds)

Is there a way or any option to make the prtg "read the sensor channel last value? do the calculation and then display the result in the PRTG chart, and also copy an OID value into same sensor but different channel and save it for future use?

calculation last-sensor-value no-uptime-oid

Created on Jan 12, 2018 3:50:53 PM by  Francis Sin (0) 1



1 Reply

Votes:

0

Your Vote:

Up

Down

Hello,

Thank you for the KB-Post. I'm very much afraid this scenario is not possible for built-in sensors in PRTG. Sensors directly themselves on know their current value (named "Last Value" in our nomenclature, I apologize for the possible confusion), but do not have the previous value at hand.
The same applies for the Factory Sensor. It's only able to access the current value of any source sensors.
I'm afraid to solve this, you'll need a script, which uses net-snmp or similar to gather the actual raw value from the target, stores it in a file, performs the delta calculation and also division, and then returns the delta-value to PRTG.

best regards

Created on Jan 15, 2018 11:29:20 AM by  Torsten Lindner [Paessler Support]



Please log in or register to enter your reply.


Disclaimer: The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.