"Mindaugas Riauba" <mind(at)bi(dot)lt> writes:
> ... So contents of database changes very fast. Problem is that when
> pg_autovacuum does vacuum those changes slows down too much.
The "vacuum cost" parameters can be adjusted to make vacuums fired
by pg_autovacuum less of a burden. I haven't got any specific numbers
to suggest, but perhaps someone else does.
regards, tom lane