Some PostgreSQL configuration parameters can e.
Reloading the server configuration files
How to do it...
There are two variants of this recipe, depending on whether you are using systemd. This is similar to the previous recipes in this chapter, and especially Starting the database server manually recipe. More details are explained there, such as the exact names of systemd service units depending on what database server you want to reload, and which GNU/Linux distribution you are working on.
With systemd, configuration files can be reloaded with the following syntax:
sudo systemctl reload SERVICEUNIT
Where SERVICEUNIT must be replaced with the exact name of the systemd service unit for the server(s) that you want to reload...