Isn't there REALLY a way to limit the amount of RAM used by the disk buffer
cache?

After a full backup, _everything_ has been paged to disk and a 900 MHz
Athlon with 384 MB RAM is much slower than a 50 MHz 486 with 16 MB and
an older version of NetBSD.

Please tell me what the kernel option is..  I'm still running 1.5W, but
plan to move to 1.5X soon.

  -jm