[rrd-users] ERROR: malformed trend arguments

Tobias Oetiker tobi at oetiker.ch
Tue Sep 20 08:18:35 CEST 2011

Hi Casey,

Yesterday Casey McGinty wrote:

> Can someone explain what is happening in this example? I would like to
> compute a trend along with my data.
> $ rrdtool create temp.rrd --step 1 DS:temp:GAUGE:30:0:U
> DS:trend:COMPUTE:temp,10,TRENDNAN RRA:AVERAGE:0.5:1:10
> $ rrdtool update temp.rrd N:3
> ERROR: temp.rrd: malformed trend arguments

this might be stretching the COMPUTE data source type a bit ...
normally TREND(NAN) is used in CDEF arements of rrd graph. any
particular reason you wand to compute this ahead of presentation?


Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland
http://it.oetiker.ch tobi at oetiker.ch ++41 62 775 9902 / sb: -9900

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