reduce buffer cache allocation?

Hi,

Is it possible to reduce the amount of buffer cache in the memory allocation of a Unix Server? If so where can I do that?

Also, does buffer cache count as tied up memory, or will it decrease as more memory is requested by other programs.

It maybe will help you:
http://scitsc.wlv.ac.uk/cgi-bin/mansec?1\+limit

Best regards,
Iliyan Varshilov