Cuts on cacti graph

[davidcano92]

Hi,

I have a problem in some graphs with cacti, i attached a image with one of these graphs and another with my poller setting.
I have look the rrd file and the values when it happen are NaN.

Thank you

[bangolio]

This can happen due to system issues, check the cacti machine for high RAM usage, high delays when accessing storage, high cpu, stuff like that.
Anything look suspicious?

[hope14]

Make sure you clear system cache memory regularly to avoid it , put a crontab to clear it timely