On 2014-09-29 14:44:42 -0400, Tom Lane wrote:
> Robert Haas <robertmhaas@gmail.com> writes:
> > The items I see are:
>
> > - Remove xloginsert_slots/xloginsert_locks GUC - Not yet!!
>
> > The text seems to indicate that there's some disagreement on this
> > point. I don't have a strong opinion on whether or not to keep the
> > GUC, but if we're going to remove it it should probably happen before
> > beta3. It's going to be impossible to remove once we've released with
> > it, I suspect.
>
> The lack of any documentation for the GUC (neither in config.sgml or
> postgresql.conf.sample) suggests very very strongly that it was not
> meant to be shipped.
That's definitely the case.
> If we don't remove it I will certainly insist that it be documented
> adequately.
Definitely.
> Personally I think a hardwired #define should be plenty. What's the
> argument that users will need to tune this at runtime?
That right now it can make quite noticeable differences in
scalability. And we have not much data to justify 8 as the default. And
that's surely not going to change if we require recompiles.
Greetings,
Andres Freund
-- Andres Freund http://www.2ndQuadrant.com/PostgreSQL Development, 24x7 Support, Training &
Services