Re: another autovacuum scheduling thread

I'm debating whether I should move forward with committing this [0] for
v19.  On one hand, I think I've addressed all the latest feedback, and I'm
not aware of any sustained objections to the approach.  But on the other
hand, there hasn't been much discussion since November (my fault), and I
can't quite tell if this patch has enough support.  At the moment, I'm
leaning towards committing it, but I'm curious what folks think.

[0] https://postgr.es/m/attachment/191721/v11-0001-autovacuum-scheduling-improvements.patch

-- 
nathan