# cat /boot/loader.conf
zfs_load="YES"
autoboot_delay="3"
vfs.zfs.arc_meta_limit="18055892992"
vfs.zfs.write_limit_override="2073741824"

kern.ipc.nmbclusters="262144"
kern.ipc.nmbjumbop="262144"
kern.ipc.nmbjumbo16="32000"
kern.ipc.nmbjumbo9="64000"