John Iliffe wrote: > So, the problem is resolved, although I have no idea why it was necessary. The key seems to be the PrivateTmp=true in the systemd service. Apache is not chrooted as demonstrated upthread, but that setting alone makes the normal, system-wide /tmp inaccessible to its processes, including the postgres Unix domain socket opened there. I suspect that your attempt to set PrivateTmp=false as a test was missed by systemd for some reason. You could probably insist in that direction and eventually make it work, but I don't see how it's better than the alternative /var/pgsql or localhost through TCP. > Also, I now have several hundred programmes to update to add the host path > and none of them will now be portable. Given that you set two directories: /tmp and /var/pgsql, I would think you can let the other apps use /tmp as before and have only Apache use /var/pgsql ? Best regards, -- Daniel Vérité PostgreSQL-powered mailer: http://www.manitou-mail.org Twitter: @DanielVerite -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general