pgdata# SELECT name, setting FROM pg_settings WHERE source != 'default';
            name            |                         setting                   
       
----------------------------+---------------------------------------------------
-------
 application_name           | psql
 archive_command            | rsync -a %p postgres@standby:/home/postgres/wal_archive/%f
 archive_mode               | on
 checkpoint_segments        | 30
 client_encoding            | UTF8
 config_file                | /home/postgres/pgdata/postgresql.conf
 data_directory             | /home/postgres/pgdata
 DateStyle                  | ISO, MDY
 default_text_search_config | pg_catalog.english
 effective_cache_size       | 49152
 fsync                      | on
 hba_file                   | /home/postgres/pgdata/pg_hba.conf
 hot_standby                | on
 ident_file                 | /home/postgres/pgdata/pg_ident.conf
 lc_collate                 | en_US.UTF-8
 lc_ctype                   | en_US.UTF-8
 lc_messages                | en_US.UTF-8
 lc_monetary                | en_US.UTF-8
 lc_numeric                 | en_US.UTF-8
 lc_time                    | en_US.UTF-8
 listen_addresses           | *
 log_line_prefix            | %t 
 log_min_duration_statement | 1000
 log_timezone               | America/New_York
 logging_collector          | on
 maintenance_work_mem       | 65536
 max_connections            | 15
 max_stack_depth            | 2048
 max_wal_senders            | 2
 server_encoding            | UTF8
 shared_buffers             | 16384
 synchronous_commit         | off
 TimeZone                   | America/New_York
 transaction_deferrable     | off
 transaction_isolation      | read committed
 transaction_read_only      | off
 wal_buffers                | 512
 wal_keep_segments          | 32
 wal_level                  | hot_standby
 work_mem                   | 24576
(40 rows)