I want to upgrade my existing installation and would like to ensure the db is not modified until I get the new installation running.
Is there any way to restart into a single user mode so that a pg_dumpall works as the superuser? Or am I limited to a stop, fiddle with pg_hba.conf, restart, pg_dumpall, etc.?
"reload mode simply sends the postgres process a SIGHUP signal, causing it to reread its configuration files (postgresql.conf, pg_hba.conf, etc.). This allows changing of configuration-file options that do not require a complete restart to take effect."
One advise:
1. change pg_hba.conf;
2. kill all user sessions (or kindly ask them to disconect);