Michael Paquier <[email protected]> writes:
> On Tue, Dec 30, 2014 at 4:30 AM, Fabrízio de Royes Mello
> <[email protected]> wrote:
>> Shouldn't we simply leave if recovery_min_apply_delay is lower 0, and not
>> only equal to 0?

> Trivial patch for master and REL9_4_STABLE attached as long as I don't
> forget it..

It was originally intentional that the apply delay could be negative, cf

http://www.postgresql.org/message-id/[email protected]

The argument for that was completely bogus, as noted further downthread:

http://www.postgresql.org/message-id/[email protected]

but it looks like there are still residues of it in the committed patch;
both this and the totally meaningless reference to timezone differential
in the parameter's documentation.

Of course, if recovery_min_apply_delay were a proper GUC, we'd just
configure it with a minimum value of zero and be done :-(

                        regards, tom lane


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