Re: Three Variations of postgresql.conf

On 11/12/2015 08:07 AM, Melvin Davidson wrote:
> Ubuntu does not use the standard pg_ctl for postgreSQL. Instead, it uses
> pg_ctlcluster.
> That in turn controls the different PostgreSQL clusters. When you do an
> install of a new cluster, pg_ctlcluster is smart enough to put
> postgresql.conf & pg_hba.conf into separate dirs.
> So to be specific, /usr/lib/tmpfiles.d/postgresql.conf is just a tmp
> file that you can ingnore, /etc/postgresql/9.4/main/postgresql.conf is
> the original version for the 9.4 cluster and

No, it is the actual conf file for the cluster.

> /var/lib/postgresql/9.4/main/postgresql.auto.conf is the actual, live
> version of the 9.4 cluster that you need to change to affect the 9.4
> cluster. Likewise for the pg_hba.conf.

No, as you can see if look in the file:

# Do not edit this file manually!
# It will be overwritten by the ALTER SYSTEM command.

There is no pg_hba.conf file in /var/lib/postgresql/9.4/main/ it is in
/etc/postgresql/9.4/main/

/etc/postgresql/* is where configuration is done, with the exception of
those done through ALTER SYSTEM, which are persisted in
postgresql.auto.conf.

>
> On Thu, Nov 12, 2015 at 10:46 AM, Michael Convey <smconvey@gmail.com
> <mailto:smconvey@gmail.com>> wrote:
>
>     In Ubuntu 14.10, there are three variations of the postgresql.conf
>     configuration file, as follows:
>
>     /var/lib/postgresql/9.4/main/postgresql.auto.conf
>     /usr/lib/tmpfiles.d/postgresql.conf
>     /etc/postgresql/9.4/main/postgresql.conf
>
>     What is the difference between these files and which is the correct
>     one to change for modifying the configurations contained therein?
>
>
>
>
> --
> *Melvin Davidson*
> I reserve the right to fantasize.  Whether or not you
> wish to share my fantasy is entirely up to you.


--
Adrian Klaver
adrian.klaver@aklaver.com