Problem Graphing Host with 4hr Check Interval

[mrochelle]

I've updated the prior post with the actual returned data. And yes, I'm graphing on the host with the smaller interval.

[abrist]

I have not heard of any issues with check interval causing NaNs in perfdata. If you increase the interval on a different host's working check, does it start to generate NaNs as well?

What does the host ET_50015 RRD look like:

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rrdtool dump /usr/local/nagios/share/perfdata/ET_50015/_HOST_.rrd

[mrochelle]

Interesting. Although I am graphing in 5 min intervals now, the dump is not showing the data. It should have started around 10:00AM today. I can try your suggestion for increasing another host tonight.

<!-- 2013-04-28 01:00:00 CDT / 1367128800 --> <row><v> NaN </v></row>
<!-- 2013-04-28 07:00:00 CDT / 1367150400 --> <row><v> NaN </v></row>
<!-- 2013-04-28 13:00:00 CDT / 1367172000 --> <row><v> NaN </v></row>
<!-- 2013-04-28 19:00:00 CDT / 1367193600 --> <row><v> NaN </v></row>
<!-- 2013-04-29 01:00:00 CDT / 1367215200 --> <row><v> NaN </v></row>
<!-- 2013-04-29 07:00:00 CDT / 1367236800 --> <row><v> NaN </v></row>
<!-- 2013-04-29 13:00:00 CDT / 1367258400 --> <row><v> NaN </v></row>
<!-- 2013-04-29 19:00:00 CDT / 1367280000 --> <row><v> NaN </v></row>
<!-- 2013-04-30 01:00:00 CDT / 1367301600 --> <row><v> NaN </v></row>
<!-- 2013-04-30 07:00:00 CDT / 1367323200 --> <row><v> NaN </v></row>
<!-- 2013-04-30 13:00:00 CDT / 1367344800 --> <row><v> NaN </v></row>

[scottwilkerson]

Does this machine have rrdcached enabled? This could cause what you are seeing

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service rrdcached status

[mrochelle]

rrdcached: unrecognized service. Don't believe I do.

[abrist]

Any chance your script is returning a string and not a number?

[mrochelle]

I would not think so since the same script works if the check interval is smaller.

[abrist]

Let us know what happens with the other host this evening.

[mrochelle]

I changed the monitoring interval back to 240 mins on ET_50015 around 8:00PM last night and as you can see, the graphing stopped.
rrdtool dump /usr/local/nagios/share/perfdata/ET_50015/_HOST_.rrd
<!-- 2013-04-30 01:00:00 CDT / 1367301600 --> <row><v> NaN </v></row>
<!-- 2013-04-30 07:00:00 CDT / 1367323200 --> <row><v> NaN </v></row>
<!-- 2013-04-30 13:00:00 CDT / 1367344800 --> <row><v> NaN </v></row>
<!-- 2013-04-30 19:00:00 CDT / 1367366400 --> <row><v> 1.0000000000e+00 </v></row>
<!-- 2013-05-01 01:00:00 CDT / 1367388000 --> <row><v> NaN </v></row>
<!-- 2013-05-01 07:00:00 CDT / 1367409600 --> <row><v> NaN </v></row>

[abrist]

Are the checks happening at the same time as the rrd information is recorded? 1:00, 7:00,13:00,19:00 etc?