[[ large mmap()ed files causing problems with VM system snipped]]


>Currently when a large (150Mbyte) batch job starts the system appears
>to be dead to everything except ping for several minutes after which
>performance returns to normal with the batch job using > 95%CPU.
>
>TIA for any help/advice.

This sound exactly like the sys/vm/vm_pageout.c tsleep() bug discussed
only yesterday in port-i386@netbsd.org.  Consult the archives for a
fix.

If you are experiencing the nothing-can-run problem,
I would recommend upgrading the kernel to 1.2 and installing this fix
_now_, and installing the official 1.2 patch-kit when it comes out.

--Jonathan