Simon- The RRD data is compiled in 4 hour, 24 hour, 1 week, 1 month and 1 year durations. The data is plotted about every 6 hours rather than at specific times. That's just how nagios works. All of my graphs for the above durations are blank. If I force a check (manually get a data point) a couple times, I get a small pixel or two long line. But the next day, my graphs have no dots or lines afterwards even though 2 or 3 points of data are in there somewhere.
I thought about your last paragraph... If my checks are 6 hours apart and my shortest RRD is 4 hours, wouldn't that pretty much keep the RRD's empty most of the time? If that is a stupid question, my goal would be to simply draw lines between the points. I'm going to make my polling interval 2 hours and see what kind of graphs I get. Thanks for your insight. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Simon Hobson Sent: Wednesday, May 14, 2008 10:19 AM To: [email protected] Subject: Re: [rrd-users] Graphing Sparse Data Laack,Jacob C wrote: >I am monitoring many services with Nagios and the data ends up in >RRDs which I graph using pnp. (I promise this is an rrd question.) >One type of service is only checked every 6 hours (instead of the >normal 5 minutes) so only 4 pieces of data are put into the RRD file >a day. rrdgraph shows empty graphs for 4 and 24 hours since the >data is so sparse. Would it be possible to use CDEF (or some other >rrdgraph magic) so that if the current plot point contains no data, >it looks ahead into the RRD file and uses that data? Lets clarify what you mean/want ... Firstly, if we assume you are sampling at midnight, 6am, midday, and 6pm, and you are graphing at 3pm - what do you get ? what do you want ? If you are getting a graph that shows some data at midnight, 6am, and midday - but gaps in between, then that's a matter of adjusting your rrd to allow for the sampling you are doing. If your graph shows blocks from midnight to 6am, 6am to midday, but you want something drawn from midday to 3pm - then you can't have it as the period midday to 6pm has not happened yet and so cannot be drawn. _______________________________________________ rrd-users mailing list [email protected] https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users Sponsored by Catholic Health Initiatives and Immanuel Health Systems, Alegent Health is faithful to the healing ministry of Jesus Christ, providing high quality care for the body, mind and spirit of every person. The information contained in this communication, including attachments, is confidential and private and intended only for the use of the addressees. Unauthorized use, disclosure, distribution or copying is strictly prohibited and may be unlawful. If you received this communication in error, please inform us of the erroneous delivery by return e-mail message from your computer. Additionally, although all attachments have been scanned at the source for viruses, the recipient should check any attachments for the presence of viruses before opening. Alegent Health accepts no liability for any damage caused by any virus transmitted by this e-mail. Thank you for your cooperation. _______________________________________________ rrd-users mailing list [email protected] https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
