Alvaro Herrera <alvherre@xxxxxxxxxxxxxxxxx> writes: > Also if autovacuum is eating all your I/O you may want to look into > throttling it back a bit by setting autovacuum_vacuum_cost_delay to a > non-zero value. BTW, why is it that autovacuum_cost_delay isn't enabled by default? I can hardly believe that anyone will want to run it without that. *Especially* not with multiple workers configured by default. regards, tom lane