Teodor Sigaev <teodor(at)sigaev(dot)ru> writes:
> On production instance I have an installed preloaded library which affects
> postgresql's optimizer (online_analyze if somebody is interesting). It works
> well except executing make installcheck of other modules, for example btree_gist:
If you're fooling with the optimizer's behavior I'd think a lot of the
core regression tests would show bogus "failures" as well. Contrib
module tests seem like the least of your worries.
regards, tom lane