Avleen Vig writes "Finally I have completed my paper on tuning the FreeBSD system for various common tasks, to compliment the paper on compiling and tuning the FreeBSD kernel. These papers were written against FreeBSD 4.x systems but should be equally applicable to 5.x systems on almost all counts.
Compiling and tuning the FreeBSD kernel: http://silverwraith.com/papers/freebsd-kernel.php
Performance tuning FreeBSD for different applications: http://silverwraith.com/papers/freebsd-tuning.php.
You will find within, details on tuning your network, disks, sysctls and kernel for maximum performance under various conditions."