But in both of the machines I have the same os and I used the same repository - postgresql rpm repository. The only difference is that in machine 2 I also installed all pg 9.6 packages. Even When I try to use /usr/pgsql-9.2/bin/psql the psql still tries to access the /var/run/run/postgresql dir as the socket dir. Does those packages include a different libpq ? What postgres package change the libpq ?
בתאריך יום ד׳, 9 בינו׳ 2019 ב-17:13 מאת Jeff Janes <jeff.janes@gmail.com>:
I'm aware of how I can solve it. I wanted to understand why after installing the pg 9.6 packages suddenly psql tries to access the socket on /var/run/postgresql. Does the libpq default unix socket is changed between those two versions ? (9.6,9.2)
It is not a version issue, but a packaging issue. Different systems have different conventions on where sockets should go, and the packager imposes their opinion on the things they package.