[rrd-users] NaN NaN NaN !!

[Simon Hobson]

Carine Cheddi wrote:

>I know of a lot of post talk about NAN, but I can't resolve it.
>
>I try this:
>rrdtool create temperature.rrd --step 300 \
>DS:temp:GAUGE:600:-273:5000 \
>RRA:AVERAGE:0.5:1:1200 \
>RRA:MIN:0.5:12:2400 \
>RRA:MAX:0.5:12:2400 \
>RRA:AVERAGE:0.5:12:2400
>
>and this (with different value)
>rrdtool update temperature.rrd N:25
>
>And I obtain this:
>nsp-nms:/usr/local/cacti/rra# rrdtool fetch temperature.rrd MAX
>timestamp    temp
>
>1211392800:  nan
>1211396400:  nan
>1211400000:  nan
...

You haven't put enough data in to have any values stored ! Try adding 
a few more samples and you should start to see some data coming back 
out.