Re: poor performance when recreating constraints on large tables

Mike Broers <mbroers@gmail.com> writes:
> I am in the process of implementing cascade on delete constraints
> retroactively on rather large tables so I can cleanly remove deprecated
> data.  The problem is recreating some foreign key constraints on tables of
> 55 million rows+ was taking much longer than the maintenance window I had,
> and now I am looking for tricks to speed up the process, hopefully there is
> something obvious i am overlooking.

maintenance_work_mem?

            regards, tom lane