Boot loader tune

[demian]

Hi everyone, Im testing squid on my pfsense box 2.0.3-RELEASE (64bits) FreeBSD 8.1-RELEASE-p13, and I read that by adding some parameters to /boot/loader.conf, squid will work better, because it is not so efficient.
These are the parameters to be included:
kern.ipc.nmbclusters=32768
kern.maxfiles=65536
kern.maxfilesperproc=32768
net.inet.ip.portrange.last=65535

Is this correct? Do you know about this?

thanks