@doktornotor:
This package will NOT work properly with the ramdisks. It is also a rather horrible idea if you ask me.
# du -sh /var/db/ntopng/
4.5G /var/db/ntopng/
The above is data accumulated after some ~6 months of usage on a site with pretty moderate traffic (~100GB/month). Sure like hell you do not want that to be in your RAM, or be backing that up and restoring on reboot.
No I actually don't care about historical data but I find ntopng quite useful to have a glimpse on the traffic that is going through pfsense in a nicely presented interface. I am ok with the db being cleared on reboot. I dont know though what will happen if var runs out of space, i.e. will dhcpd be unable to write leases on disk etc.