[rrd-users] Re: Graph Difficulty [long -- Sorry]

[Tobias Oetiker]

Today you sent me mail regarding Re: [rrd-users] Graph Difficulty [long --...:

*> Owen DeLong wrote:
*> > 
*> > I am graphing some temperature probes, and when I use a lower-limit
*> > of 55 degrees and make the graph rigid, I get a somewhat reasonable
*> > graph.  However, I'm hoping to get auto-ranging working.  Currently,
*> > the autorange feature works fine for the upper limit of the graph,
*> > but always selects zero (0) as the lower limit.  Since I live in
*> > the San Jose area, the outside temperature never gets that low, let
*> > alone the temperature inside my house.
*> > 
*> 
*> I restored the database and tried it.  It seems that if the time "now"
*> is reached, it fails.  set '--end now-5h' and then the Y-axis will go
*> from 60 to 75, or use alt-autoscale for 65.5 to 72.5
*> 
*> Tobi,
*> 
*> It seems that this is a bug introduced in 1.0.4, I assume that when the
*> unknown value at the end is reached, im->minval is set to zero.
*> Couldn't find out where, sorry.  I do not have the 1.0.3 and 1.0.4 sources
*> available so I couldn't diff.

I just checked out the source ... 
the min max processing happen in the data_proc function ... but I can not
see how things should fail ...

anybody willing to send me (in private mail) a little script which
demonstrates the problem (shell script that is because debugging the perl
module is no fun)

cheers
tobi

*> Regards,
*> 

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