Thanks for both of you for these details.
By "serialized", I mean non-parallel package builds because of the
waitrepos.
Can host.capacity be changed on the fly (pop into psql while stuff is
running)? If not, how well does the system handle a kojid stop with a bunch
of outstanding work?
/etc/init.d/kojid stop
change capacity
/etc/init.d/kojid start
and outstanding tasks are handled cleanly.