[INFO] What is this 'm' or 'u' after my numbers in graphs??

[rony]

Because of the amount of resent post I have been seeing, and past, I have decided this is sticky information.

Basically, if you see a letter after a number on your graphs, it is an unit that rrdtool has converted that value to. This is done for readability. The following table gives you an idea of the possible units that will follow a number in your graphs.

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10^-18  a - atto
10^-15  f - femto
10^-12  p - pico
10^-9   n - nano
10^-6   u - micro
10^-3   m - milli
0    (no unit)
10^3    k - kilo
10^6    M - mega
10^9    G - giga
10^12   T - tera
10^15   P - peta

[spex]

If you have value's based on 1024 e.g. from storage devices the values shown are wrong. Can you tell cacti to handle that correct, or is a cdef the only solution.
Regards Spex

[rony]

In the data source, base value should be changed from 1000 to 1024.

[spex]

I could not find the place where you can change the base value.
Looked at datasource and datatemplate and at rrd with rrdeditor.
Can you please explain a little more....
Regards Spex

[rony]

I should really consider sleeping more, it might help me to answer questions right.

It's actually a graph value not a data source value.

Sorry...

[spex]

It's actually a graph value not a data source value.

I can not find the desired item.
Maybe you talk about a definition of cdef's or gprints.
But the scaling is as far as I know be done automatically by rrdtool.
So cdefs or gprints are not the right way.

Regards Spex

[jt72]

I am reading/graphing a value reported in tenths - eg 101 is value given back which equals 10.1 dBmV.

This works fine unless the value is between -9 to +9 (so -.9 to +.9 dBmV). In this case I get 900m instead of .9

Is it possible to restrict the values to one decimal place or to use a specific notation? It's not a big deal, but the data is represented in a way users are not familiar with.

[BSOD2600]

This is an rrdtool issue, so if you figure out how to do it (maybe reading through the manual), then yes, it can be possible .

[DervMan]

Did you find a solution to this?

I too am getting 200m on the y axis when I want .20.

Thanks

[mensmaximus]

How your values are show below the graph is a matter of gprint settings. The predefined gprints have all a trailing %s which will "autoscale" numbers to milli, mega, peta and so on.

If you want to display your values in "real" format just define a new gprint preset (cacti console - management - graph management - gprint presets - add) named e.g. "myrealvalues" with %8.2lf as gprint text.

In your graphtemplate now all you have to do is to select "myrealvalues" as the gprint type for each graph item you want to display "real" numbers.

[jweinraub]

I know this was published quite some time ago, but I am still getting the suffix and load average already has

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%8.2lf

.

In here:



It seems to only happen with 0.x mm. Once it gets above 1.0 mm, it is fine, e.g.:



Any ideas as to why this is occurring?

[phalek]

The later Cacti versions have a pre-defined CDEF called "Exact numbers". Try that one

[jweinraub]

I am using exact numbers right now. It appears to be the same result.
Edit: I just added the exponent to zero. It seems to have done the trick.


However, doing the same trick, won't work for this graph:



It doesn't show the decimal so it has the same significant digits so the graph is fairly useless since pressure is rather subtle.