I am currently using pnp4nagios as a graphing utility but have found that because it uses rrdtool, it has some limitations. Most of my services only run once a week which means that the graph doesn’t actually end up displaying anything due to the limited number of data points.
Does anyone know of a performance data tool which could work for my purpose? Even just displaying the data in a table would be an improvement.
Thanks
correctly configuring the RRD file will solve the problem 
check the man pages for rrdtool, you need to set up different values for the data interval and heartbeat of the RRD.
Thank you for the response, I will read through the man pages and post what I find for others. I had previously posed this question on the pnp4nagios site and they responded saying rrdtool was not built for infrequent checks like this.
EDIT (21 Jul 2011 11:41 GMT-5):
The file with the default heartbeat and step size for pnp4nagios is set here: …/pnp4nagios/etc/process_perfdata.cfg
My understanding is that the heartbeat will set the maximum time to wait before an UNKNOWN value is returned and step will set the minimum interval between accepting a new value so I have left step alone and have changed the default heartbeat to be 1week (604800). I will repost later once I am able to see if it works. From what I understand, the only downside for a large heartbeat is that the graph will “hold” a value for a long time if no new data is received rather than set it to UNKNOWN.
that MIGHT be… but i honestly don’t see a big difference between adding a point every 300 or every 36000 secs…
might take some time to see a correctly working graph
Just an update for anyone else in this situation:
The solution posted above in my edit worked. All you have to do is change the heartbeat as described. I also received an email from the guys at pnp4nagios regarding which files contain information about heartbeat and step configuration. They noted the same file (process_perfdata.cfg) along with a second “rra.cfg” in the same directory. I do not have a rra.cfg file, but if you do you may want to check/edit that file as well.
Thanks again luca