On Sun, 7 Nov 1999 14:01:15 -0500 
 gabriel rosenkoetter <gr@eclipsed.net> wrote:

 > On Sun, Nov 07, 1999 at 09:33:22PM +0900, Tsubai Masanari wrote:
 > > ...
 > > CPU: 750 (Revision 8202)
 > > total memory = 65536 KB
 > > avail memory = 51252 KB
 > > using 2048 buffers containing 8192 KB of memory
 > > mainbus0 (root)
 > > cpu0 at mainbus0: 1MB backside cache enabled
 > > ...
 > 
 > Erg:
 > 
 > CPU: 750 (Revision 202)
 > real mem  = 301989888
 > avail mem = 283185152

...judging from the output of this, you're running a much older kernel.
You should upgrade.

        -- Jason R. Thorpe <thorpej@nas.nasa.gov>