Den 2014-03-26 7:16, Novosielski, Ryan skrev:
I run Xymon 4.3.12. I see I had an alert from a server earlier
tonight at 99% of / full. However, it is 66% now and no evidence that
this ever happened on the graph of that filesystem. Is it possible for
a disk to fill for a very short period and never hit the graph? I
don't know what could have even done that.
It is possible, if the change is very large, and it only lasts for a very brief time.
Graphs are handled by rrdtool, which "smoothes out" large changes in values. So if the 99% only lasted for a single poll (5 minutes) and it has now settled at 66%, then it is quite likely that you will see the disk graph going up over a couple of samples to reach the 66% line (try zooming in on the time around the peak).
Regards,
Henrik