8.0.0beta3 vacuum analyze

I *think* I'm seeing "vacuum analyze" queries launched automatically on an
8.0.0beta3 (unless I have a rogue autovac running that I haven't spotted).
Is this something new in 8.0 and to be expected?

My settings:

#vacuum_cost_delay = 0        # 0-1000 milliseconds
#vacuum_cost_page_hit = 1       # 0-10000 credits
#vacuum_cost_page_miss = 10     # 0-10000 credits
#vacuum_cost_page_dirty = 20    # 0-10000 credits
#vacuum_cost_limit = 200        # 0-10000 credits

Ed