[rrd-users] How to find a grafics error?

Simon Hobson linux at thehobsons.co.uk
Wed Jun 10 12:37:16 CEST 2015

Peter A. Menzel <prot_from_spam at famenzel.at> wrote:

> my cgi output for the monthly periode seems to have errors (in detail: see attached image).
> As you can see on http://hk1.famenzel.at/cgi/hk1.cgi the output for the last week ("letzte Woche") is ok (continued graphs for the temperatures), but shown interrupted in the monthly graph ("letzter Monat").
> Also the pump indicators ("HK1Pumpe", "HK3Pumpe" aso) show some activity in this graph and the yearly one ("letztes Jahr"). This seems to be wrong too.
> How can I find the source of the problem?

You'll need to provide a lot more information - at the moment it's "I create a graph using an unknown script/command, using unknown data, and 'it doesn't work'".

A first step would be to show what commands you used to create the RRD files and the graphs, plus a sample of the data going in.

Your graph in the email (the link doesn't work for me) has breaks in it - that can often be as simple as having a heartbeat interval that's too short so you get a lot of "unknown" data.

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