View Heroku Postgres configuration settings

heroku_postgresql_config_settings.md

Run PG:PSQL

With pg installed, you can run the pg:psql Heroku command to connect to your database and execute commands using the psql interactive terminal:

$ heroku pg:psql

psql (9.3.5, server 9.3.3)
SSL connection (cipher: DHE-RSA-AES256-SHA, bits: 256)
Type "help" for help.
database-name=> |

View configuration settings

Heroku tunes postgres server configuration settings, so settings are not necessarrily the defaults. Use the pg_settings view to see what the config settings are on your actual dabatase instance:

database-name=> select name, short_desc, setting from pg_settings where name like '%constraint_exclusion%';

         name         |                         short_desc                          |  setting
----------------------+-------------------------------------------------------------+-----------
 constraint_exclusion | Enables the planner to use constraints to optimize queries. | partition
(1 row)

Close the PG:PSQL connection

database-name=> \q
$