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Transforms - Get the delta of a poller value

Is it possible to get the delta change of a poller's value?

Here is what I am trying to do: I have an OID which is an absolute counter. I would like to see the change of this OID as it gets poller. So, if I poll every 5 minutes, and the value is initially 5, and the next poll it goes to 10, I would like to have a transform which shows me the delta, 5.

Thanks

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qle

I'm assuming you're referring to UnDP pollers. If so, this sounds so simple yet I'm not aware of a way to do this. Obviously, the trick here is to be able to reference the prior value of the poller and I'm not aware of a variable that does so. We know they're present once we choose to keep historical data.

bwicks

Is it possible to calculate the Delta of a counter with UnDP?

Example I am trying to calculate the SSL transactions per second on a F5 load balancer

For the SSL TPS graph metric:

1. Poll the OID sysStatClientTotConns (.1.3.6.1.4.1.3375.2.1.1.2.1.7)

twice, at a 10-second interval.

This results in two values, <sysStatClientTotConns1> and <sysStatClientTotConns2>.

2. Calculate the delta of the two poll values:

<DeltaStatClientTotConns> = <sysStatClientTotConns2> - <sysStatClientTotConns1>

tdanner

If you configure the poller as a 'Counter' poller, it will do what you are looking for: subtract the previous value from the current value and divide by the time in seconds between when the two values were observed.

Craig651

Hi, I did exactly as stated above, but it is reporting the delta WITHOUT dividing the time in seconds between the two polls, did I not set the unit and time frame correctly???