Holes in RRD graphs. Undersized hardware?



  • I got a few 500MHz running, nanobsd 512Mb. 2.0.1-RELEASE (i386), FreeBSD 8.1-RELEASE-p6. All is default settings.

    One of them is under quite a bit of load.
    States right after reboot: 7078/23000

    Now I get a symptom that RRD graphs may have holes in them… I guess it must be due to undersized hardware. Screenshot is here: https://dl.dropbox.com/u/1411299/reboot_pfsense.png. Trafic has been in/out all the time, so no router crash. Just a temporary stop in logging data for the graphs.

    Is this a sign of undersized hardware?
    If so what should be increased of the hardware to (processor, RAM, other). I typically buy routers at applianceshop.



  • I don't think 7000/20000 is that bad.

    For best results on sizing requirements can be found here www.pfsense.org/index.php?option=com_content&task=view&id=52&Itemid=47

    I believe that the graphs are a low priority and the device could be busy with something else causing it to not log data, usually that's the case when you have gaps in the graphs that i have seen, similar to when pfsense ignores pings when coming from a vpn.

    What are you running service wise?



  • Anything related in the system log? My first guess with those symptoms would be running short on RAM and there's no swap w/nano so the RRD gathering process would just have to die in that case.



  • Wow… sorry for this late response.

    Thanks for the answer.
    More RAM is what is (probably) what is needed.

    I am not to sure what to look for in the logs.
    But I can say that even though they do not log graphs from time to time then these boxes run dead stable.


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