Re: Change default of checkpoint_completion_target

Howdy,

On 2020-Dec-10, Stephen Frost wrote:

> * Laurenz Albe (laurenz.albe@cybertec.at) wrote:
> > On Tue, 2020-12-08 at 17:29 +0000, Bossart, Nathan wrote:
> > > +1 to setting checkpoint_completion_target to 0.9 by default.
> > 
> > +1 for changing the default or getting rid of it, as Tom suggested.
> 
> Attached is a patch to change it from a GUC to a compile-time #define
> which is set to 0.9, with accompanying documentation updates.

I think we should leave a doc stub or at least an <indexterm>, to let
people know the GUC has been removed rather than just making it
completely invisible.  (Maybe piggyback on the stuff in [1]?)

[1] https://postgr.es/m/CAGRY4nyA=jmBNa4LVwgGO1GyO-RnFmfkesddpT_uO+3=mot8DA@mail.gmail.com