graphing division of two variables?

[vladah]

Hello,

I can collect two variables via snmp, x1 and x2. But need to present on my graph x1/x2? Is this possible?

Cheers,

Vlad

[gandalf]

Yeah, of course. This can be done via CDEFs, in your case cdef=a,b,/. If you need a walkthrough, please start creating a graph that holds both values, x1 and x2, respectively, without any CDEF
Reinhard

[vladah]

I got it working, but what I would like to see is graph without separate a and b, just a/b.

Write now I have a, b and a/b. Is it possible to remove a nd b from the graph representation?

Cheers,

Vlad

[vladah]

this is in relation to cisco SAA jitter thingy.

There is no RTTavg OID, just RTTMax and RTTMin, so to get RTTavg,

RTTavg=RTTSum/NumOfRTT.

I'd like not to see RTTSum and NumOfRTT on the graph...just RTTavg alongside with RTTmax and RTTmin...

Cheers,

Vlad

[gandalf]

I got it working, but what I would like to see is graph without separate a and b, just a/b.

Write now I have a, b and a/b. Is it possible to remove a nd b from the graph representation?

Cheers,

Vlad

Ho, hooooh, Fury. This was the _first_ step, only. Now, please create the next CDEF called "Make 0" (I'm not sure if it exists on the plain distro, I always have it) like cdef=CURRENT_DATA_SOURCE,0,* and apply it to those LINEx items, you want to "omit".
Recently, there was some change in this (0.8.6i), but I did not check out until now.
Reinhard

[vladah]

What I want to ommit are comments from the graphs (last two rows bellow RTTs values, being

NumOfRTT and RTTSum...

I need those two values just for forming RTTavg=RTTSum/NumOfRTT, but don't need them on the graph as comments, or GPRINTs or Lines...

I would like just to see RTTmax, RTTmin, and RTTavg....

Cheers,

Vlad

[gandalf]

So simply delete them from the Graph Template. This will change all associated graphs instantaneously
Reinhard

[vladah]

If I delete NumOfRTT and RTTSum will I not loose RTTavg=NumOfRTT/RTTSum, cause CDEF function which builds this devision calls for these two variables???

I need them for RTTavg but not want to see them on the graph?

Cheers,

Vlad

[gandalf]

So simply delete them from the Graph Template. This will change all associated graphs instantaneously
Reinhard

By deleting I meant: delete the comment line. You'll need a LINE1 graph item that you may suppress, as said above, by using the Make 0 cdef. And then, you'll have that ds still available for your cdef calculations.
Reinhard

[vladah]

I've got 4 data sources a, b, c and d being:

a RTTmin
b RTTmax
c RTTsum
d NumOfRTT

item 13 (COMMENT: RTTSum) is c and item 17 (COMMENT: NumOfRTT) is d in the pic.

item 9 (No Task: RTTavg) is calculated and graphed by deploying CDEF called RTTavg=c/d.

How can I then delete item 13 and item 17?

Cheers,

Vlad

[vladah]

I'm getting nice images, but perhaps I'm missing something... just want to stop some variables from being shown on my graphs and don't know how to do that because other variables which has to be graphed directly depend on them through CDEF...

Cheers,

Vlad