Re: {bb} Larrd: adjusting graph for load avg

[<joe@finalpath.com>]

Let me rephrase my original question. The graphs are going to be used in a
presentation. Therefore I was asked if the scale could be enlarged or
stretched vertically just for visibility purposes.


On Thu, 5 May 2005, Scott Walters wrote:

> > Ive been asked to provide some graphs showing the load average of a
> > particular server of ours. The trouble I have is the server is stressed so
> > little that the load average plotting is barely visible. Is it possible to
> > change the scale to make the plotting of the la trends stand out more?
> 
> Yes, but I don't think it is a good idea.  The stock code fixes the y axis
> limit at 1, if the load average is below that.  So there is consistently
> no processes in the run queue waiting be executed.
> 
> If the LA goes above 1, then the y axis will autoscale like the rest of
> the data.
> 
> The idea here is that *most* machines do nothing, and I wanted to have an
> apples to apples look at LA.  If you always autoscale and your LA is from
> .01-.1, it will *look* as busy as a 1-10 box.
> 
> In my experience, ppl don't read docs, or chart labels.  If your LA is so
> small it does not show up, the LA chart is telling you exactly what you
> want to know.  Your boxes do nothing.
> 
> And this should be corroborated with the SYS/USR/IDL in the vmstat graph.
> 
> And also from my understanding, if a UNIX box is completely idle, it is
> absolutely horrible and accurately measuring its idleness.  So you need
> some load to really trust the numbers.
> 
> Oh, to change the behavior, set $ENV{'LARRDLARIGID'}=1; to 0 in
> larrd-config.pl
> 
> 

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