Setting Parameters at the System Level

Master parameter settings in the master postgresql.conf file are the system-wide default. To set a master parameter:

Edit the $MASTER_DATA_DIRECTORY/postgresql.conf file.
Find the parameter to set, uncomment it (remove the preceding # character), and type the desired value.
Save and close the file.
For session parameters that do not require a server restart, upload the postgresql.conf changes as follows:
```
$ gpstop -u
```
For parameter changes that require a server restart, restart Greenplum Database as follows:
```
$ gpstop -r
```

For details about the server configuration parameters, see the Greenplum Database Reference Guide.