Re: mystery with postgresql.auto.conf

On Wed, 2024-04-10 at 10:26 -0400, Tom Lane wrote:
> Ian Lawrence Barwick <barwick@gmail.com> writes:
> > 2024年4月10日(水) 21:40 Matthias Apitz <guru@unixarea.de>:
> > > Why it does not give an error because the shared lib isn't there?
> 
> > ALTER SYSTEM is a way of modifying the PostgreSQL configuration file
> > via SQL; just as when you modify it manually, changes are not applied
> > until you actually reload the configuration.
> > See: https://www.postgresql.org/docs/current/sql-altersystem.html
> 
> Even if you had issued a reload, you would not have noticed the
> faulty setting without looking into the postmaster's log for
> warning messages.  The system wouldn't get in your face about it
> until you did a postmaster restart.

An alternative to looking at the log file is to

  SELECT * FROM pg_file_settings WHERE error IS NOT NULL;

after you reload.

Yours,
Laurenz Albe