When my machine is heavily loaded memory-wise (which happens a lot
with UBC) I've observed a strange behaviour.  Perhaps it's normal, but I
doubt it.
All of a sudden the machine freezes.  I can't move the mouse, there is no
sound from my speakers anymore, and there is no disk activity.  This lasts
1 - 5 seconds and then everything is back to normal again (i.e. paging like
crazy).
Can anyone shed any light?  (No, I've not been able to switch console
to get into the debugger, so no stack traces.)

    -- Lennart