Bandwith Graph - 5 Minute missing

Been seeing this lately and it seems like when bandwidth go above 60Mbps that it’ll miss 5 minutes on the graph - see graph below

I’ve run the ./poller.php -h HOSTNAME -r -f -d | ./pbin.sh from my LibreNMS box and not sure what to look for the determine the issue of miss graphs

By the way I notice this only on bandwidth graphs of device behind my firewall and graphs on the firewall itself. I did check out librenms/FAQ.md at master · librenms/librenms · GitHub and have remove some unused poller modules. I also want to know how to achieve the following:

“If you poll a large number of devices / ports then it’s recommended to run a local recurisve dns server such as pdns-recursor.”

“Running RRDCached is also highly advised in larger installs but has benefits no matter the size.”

Seems you could be having performance issues check this doc out for rrdcaching

https://docs.librenms.org/Extensions/RRDCached/

Tried that and Error Drawing graph. My RRD tool version is 1.7.0