I’ve worked it out.
Some of my devices for their own fiendish reasons take more than 10 seconds to respond to SNMP.
I found this out using the ipMonitor tool from Solarwinds. The worst are taking almost 60 seconds on some occasions.
Maybe the way to fix this is to increase Try Timeout?
It seems to be limited to 10 seconds, but if I could get it to 60 seconds, I think that I could get rid of my remaining graph gaps.
