[Observium] gaps in graphs

Hello,

i got sporadic dropouts over all my graphs. If this happen most of my graphs have dropouts.

The poller runs not longer than a minute.

`Total time for all devices: 41.07s 35.17s'

Memory usage 200 of 1000 MB RAM. All devices are in the same physical gigabit network. Ping is less than 50 ms to each device. Monitored are only 16 devices. Observium itself runs as a openvz container (turnkeylinux).

I searched the web but does not find anything that matches my setup. Does anybody have a hint for me?

Thanks,

ecaroh