[rrd-users] Oddities with rrdtool

Jean-Yves Avenard jyavenard at gmail.com
Mon Dec 28 01:25:02 CET 2009


I've encountered a very weird oddity when graphing with rrdtool ; I
can not explain why.

I am plotting five graphs together ; 99% of the time it works great.
>From time to time ; rrdtool doesn't plot anything showing weird scale
on the side.

This only seems to happen with a particular combination of graph ; not
always the same.
Graph 1,2,3,4 works
Graph 1,3,4,5 works
Graph 1,2,3,5 works
Graph 1,2,3,4,5 doesn't work

Sometimes 1,2,3,4,5 would work and all other combinations would work ;
but Graph 1 alone doesn't work... It varies...

http://i45.tinypic.com/2mmhxj.png -> ok
http://i45.tinypic.com/2llldn9.png -> ok
http://i45.tinypic.com/2llldn9.jpg -> ok
http://i50.tinypic.com/8vn3pk.png -> not ok

I have another plot that is made of only 3 graphs.
Sometimes any combination of 2 or 3 graph works ; but graphing one
alone doesn't work ; getting those ? in the scale on the lest.

It's very puzzling , because it doesn't always happen.

Does so on two different machines ; a Linux (Ubuntu) with rrdtool
1.4.2 and another FreeBSD with rrdtool 1.3.9 ....

Always on the same graph ; one that I plot from midnight to midnight
so the end time is in the future...

Any ideas ?
I've just tried again ; and all graph display properly now !!

That's the page it's from:


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