If you use or plan to use a fiber network card such as the Intel E10G42BTDA – Intel X520-DA2 with a PfSense firewall (such as our SolidRouters), you need to adjust the /boot/loader.conf.local file with informations such as :
vm.kmem_size="435544320"
vm.kmem_size_max="535544320"
kern.ipc.nmbclusters="1000000"
kern.ipc.nmbjumbop="524288"
hw.igb.fc_setting=0
hw.ixgbe.num_queues="4"
Values are to be adjusted according to your setup. The last line is relate to quad ethernet network cards from Intel.