Re: Proposal for Allow postgresql.conf values to be changed via SQL [review] - Mailing list pgsql-hackers

On 2013-03-13 18:38:12 +0530, Amit Kapila wrote:
> On Wednesday, March 13, 2013 6:10 PM Andres Freund wrote:
> > On 2013-03-12 10:46:53 +0530, Amit Kapila wrote:
> > > Do you mean to say that because some variables can only be set after
> > restart
> > > can lead to
> > > inconsistency, or is it because of asynchronous nature of
> > pg_reload_conf()?
> > 
> > As long as SET PERSISTENT cannot be executed inside a transaction - or
> > only takes effect after its end - there doesn't seem to be any problem
> > executing ProcessConfigFile() directly.
> 
> Do you mean to say we call directly ProcessConfigFile() at end of SET
> PERSISTENT instead 
> Of pg_reload_conf() but in that case would it load the variables for other
> backends?

I'd say do both. Yes, we would evaluate config potentially twice. Who
cares. Messages inside non-postmaster environments are only output at DEBUG2
anyway.

Greetings,

Andres Freund

-- Andres Freund                       http://www.2ndQuadrant.com/PostgreSQL Development, 24x7 Support, Training &
Services