Uploading Configuration File Changes Only

The gpstop utility has an option that will upload changes made to the pg_hba.conf configuration file and to runtime parameters in the master postgresql.conf file without interruption of service. Note that any active sessions will not pickup the changes until they reconnect to the database, and that many server configuration parameters require a full system restart (gpstop -r) to be activated.

To upload runtime configuration file changes without restarting

$ gpstop -u