nan?

[Guest]

Why is nan displayed in my graph? The Cron printout reads the correct values from the script, but the actual graph displays nan in the legend?

[daniel]

Hi,
I've the samr problem, my rrd file is not good updated. it as just Nan value, and at each rrdtool update, it add Nan value !!
It was strange, because snmpget have the good value, but the rrdtool update don't insert good value in rrd file.
See you soon.

[yid]

Not sure why this is happening is your specific instance, but the Nan value means that it is being recorded as unknown.

There are several causes for this:

• 1) the value is above or below your specified min or max
  2) the value step is greater than the minimum heartbeat (it took too long to gather the data, or your heartbeat is too low)
  3) the value field is not yet populated. If you have are requesting AVERAGE, MIN, and MAX, and your RRA is one datapoint per row there's no MIN or MAX to be had.

I'm not too familiar with the cmd.php or the SNMP data scripts (I don't use those portions of cacti), but I would try upping the heartbeat on your RRD first, and then changing the min/max.

Aaron