[rrd-users] Minor Graph Rendering Issue

Chris Mason chris at noodles.org.uk
Wed Dec 14 21:35:01 CET 2011

I have done some more testing and fixed the issue by passing -A to
rrdtool graph.
I was under the impression that it should autoscale to the data by default?


On 14 December 2011 16:11, Chris Mason <chris at noodles.org.uk> wrote:
> Hi,
> I have noticed that sometimes when I am graphing data using positive
> and negative values to split Inbound and Outbound that the negative
> side of the data slightly comes over the 0 line. The following image
> shows an example:
> http://netnix.org/example.png
> I only see this occurring on some graphs, although I am using the same
> method to generate them and it is seen more on 1 day graphs then
> higher intervals:
> DEF:ifInOctets=<RRD>:ifInOctets:MAX
> CDEF:ifInOctetsBits=ifInOctets,8,*
> CDEF:ifInOctetsBitsN=ifInOctetsBits,-1,*
> I have tested this on an rrdtool snapshot from last week and I am
> still seeing this.
> Is this normal and if not where would you recommend I look to
> investigate this problem further?
> Thanks,
> Chris

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