Re: [PERFORM] Foreign key performance

Stephan Szabo <sszabo(at)megazone23(dot)bigpanda(dot)com> writes:
> It appears (from some not terribly scientific experiments - see below)
> that it's likely to be related to managing the deferred trigger queue
> given that in my case at least running the constraints non-deferred was
> negligible in comparison.

At one time the deferred-trigger queue had an O(N^2) behavioral problem
for large N = number of pending trigger events. But I thought we'd
fixed that. What's the test case exactly? Can you get a profile with
gprof?

regards, tom lane