[smokeping-users] Re: Explain the graphs generated by Smokeping

Arnold Nipper arnold at nipper.de
Fri Feb 18 17:21:09 MET 2005

On 18.02.2005 14:40 Peter Farmer wrote

> Hi,
> Although I've been working with smokeping for the company I contracting 
> for at the moment, I don't really understand what the detailed graphs 
> actually show, neither can I find any docs which explain it.
> I understand that "Median" line represents packets lost, and is coloured 
> appropriately (gleaned from the config docs, ++loss_colors), but I don't 
> really understand what the grey colours are for.
> Could someone explain to me what the graphs actually show or point to a 
> relevant doc.

To put it in a nutshell: the heavy coloured line shows the median (which 
is almost always *not* the average). The more it turns to red (from 
green over blue) the more packet loss you have. The "smoke" shows the 
actual distribution of the probe resulsts. The broader the smoke the 
higher the variance of the probe. Each probe with value x and median m 
generates a grey area with height |x-m| based at m. Areas are layered 
and the smoke gets darker.

Ideally you have a green line without any smoke.


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