swap zone exhausted, increase kern.maxswzone

[fhard]

"swap zone exhausted, increase kern.maxswzone"

I encountered this today on FreeBSD 7.1B2
With an HP DL165G5  dual quad-core AMD 64
8Gb ram .. 20Gb swap space

Google doesn't bring up much more than similar inquiries
in mid 2007, where the inquiry was met with "increase the value".

I cannot find anywhere how to determine the existing value or how
to alter it.

When running "sysctl kern.maxswzone"
I am greeted with sysctl: unknown oid 'kern.maxswzone'

What am I doing wrong?

TIA
Jim Pazarena