Cacti graphs and WHITE lines

[sgagers]

Hi all,
i've a problem with my Cacti server.
During the day i've my graphs with some white lines in which there's no date collection (see the image attached).
I've noticed that it happens every day at the same hour.
My suspect is that there's something in the database speed.
Someone knows how to solve this problem?

Regards,

Valerio

[gandalf]

Sth like this may happen when e.g. a backup is running.
R.