my non-default postgres config

gistfile1.txt

psql (9.4.4)
Type "help" for help.

postgres=# 
postgres=# SELECT name, current_setting(name), source
postgres-#   FROM pg_settings
postgres-#   WHERE source NOT IN ('default', 'override');
              name               |         current_setting          |       source       
---------------------------------+----------------------------------+--------------------
 application_name                | psql                             | client
 archive_command                 | /opt/pgsql/bin/wal_shipper.rb %p | configuration file
 archive_mode                    | on                               | configuration file
 autovacuum                      | on                               | configuration file
 autovacuum_analyze_scale_factor | 0.1                              | configuration file
 autovacuum_analyze_threshold    | 50                               | configuration file
 autovacuum_naptime              | 1min                             | configuration file
 autovacuum_vacuum_cost_delay    | 20ms                             | configuration file
 autovacuum_vacuum_cost_limit    | 200                              | configuration file
 autovacuum_vacuum_scale_factor  | 0.2                              | configuration file
 autovacuum_vacuum_threshold     | 50                               | configuration file
 checkpoint_completion_target    | 0.9                              | configuration file
 checkpoint_segments             | 128                              | configuration file
 client_encoding                 | UTF8                             | client
 effective_cache_size            | 16GB                             | configuration file
 hot_standby                     | on                               | configuration file
 hot_standby_feedback            | on                               | configuration file
 lc_messages                     | C                                | configuration file
 lc_monetary                     | en_US.UTF-8                      | configuration file
 lc_numeric                      | en_US.UTF-8                      | configuration file
 lc_time                         | en_US.UTF-8                      | configuration file
 listen_addresses                | *                                | configuration file
 log_autovacuum_min_duration     | 0                                | configuration file
 log_checkpoints                 | on                               | configuration file
 log_connections                 | on                               | configuration file
 log_disconnections              | on                               | configuration file
 log_line_prefix                 | %t [%p]: [%l-1]                  | configuration file
 log_lock_waits                  | on                               | configuration file
 log_min_duration_statement      | 1s                               | configuration file
 log_temp_files                  | 0                                | configuration file
 log_timezone                    | US/Eastern                       | configuration file
 maintenance_work_mem            | 512MB                            | configuration file
 max_connections                 | 300                              | configuration file
 max_stack_depth                 | 8MB                              | configuration file
 max_standby_archive_delay       | 30min                            | configuration file
 max_standby_streaming_delay     | 30min                            | configuration file
 max_wal_senders                 | 10                               | configuration file
 port                            | 5432                             | configuration file
 random_page_cost                | 1.3                              | configuration file
 shared_buffers                  | 8GB                              | configuration file
 shared_preload_libraries        | pg_stat_statements,repmgr_funcs  | configuration file
 tcp_keepalives_count            | 9                                | configuration file
 tcp_keepalives_idle             | 1500                             | configuration file
 tcp_keepalives_interval         | 75                               | configuration file
 TimeZone                        | US/Eastern                       | configuration file
 track_activity_query_size       | 4096                             | configuration file
 vacuum_cost_delay               | 20ms                             | configuration file
 vacuum_cost_limit               | 200                              | configuration file
 wal_buffers                     | 16MB                             | configuration file
 wal_keep_segments               | 5000                             | configuration file
 wal_level                       | hot_standby                      | configuration file
 work_mem                        | 10MB                             | configuration file
(52 rows)