On 2014-09-29 11:28:07 -0700, Josh Berkus wrote:
> On 09/29/2014 08:53 AM, Andres Freund wrote:
> >> - 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.
> > I vote for keeping it.
>
> Time for me to put on my "we have too many darned GUCs" curmudgeon hat.
>
> 1. What does it do?
Change scalability in write heavy loads.
> 2. Are there reasons why users would want to change it from the
> default?
Yes, to improve scalability.
> 3. Can we explain those reasons in the form of documentation?
Yes. Try and benchmark it. It'll be hardware and workload dependant.
Greetings,
Andres Freund
-- Andres Freund http://www.2ndQuadrant.com/PostgreSQL Development, 24x7 Support, Training &
Services