diff --git a/config/environments/development.js.example b/config/environments/development.js.example
index 8aa86073..742d1980 100644
--- a/config/environments/development.js.example
+++ b/config/environments/development.js.example
@@ -34,6 +34,15 @@ module.exports.db_pool_size = 500;
 module.exports.db_pool_idleTimeout = 30000;
 // Milliseconds between idle client checking
 module.exports.db_pool_reapInterval = 1000;
+// allows to use an object to connect with node-postgres instead of a connection string
+//module.exports.db_use_config_object = true;
+// requires enabling db_use_config_object=true
+// allows to enable/disable keep alive for database connections
+// by default is not enabled
+//module.exports.db_keep_alive = {
+//    enabled: true,
+//    initialDelay: 5000
+//};
 module.exports.redis_host   = '127.0.0.1';
 module.exports.redis_port   = 6379;
 module.exports.redisPool    = 50;
diff --git a/config/environments/production.js.example b/config/environments/production.js.example
index bcb85834..3446b6d6 100644
--- a/config/environments/production.js.example
+++ b/config/environments/production.js.example
@@ -35,6 +35,15 @@ module.exports.db_pool_size = 500;
 module.exports.db_pool_idleTimeout = 30000;
 // Milliseconds between idle client checking
 module.exports.db_pool_reapInterval = 1000;
+// allows to use an object to connect with node-postgres instead of a connection string
+//module.exports.db_use_config_object = true;
+// requires enabling db_use_config_object=true
+// allows to enable/disable keep alive for database connections
+// by default is not enabled
+//module.exports.db_keep_alive = {
+//    enabled: true,
+//    initialDelay: 5000
+//};
 module.exports.redis_host   = '127.0.0.1';
 module.exports.redis_port   = 6379;
 module.exports.redisPool    = 50;
diff --git a/config/environments/staging.js.example b/config/environments/staging.js.example
index 21bcd031..9f3af63e 100644
--- a/config/environments/staging.js.example
+++ b/config/environments/staging.js.example
@@ -40,6 +40,15 @@ module.exports.redis_port   = 6379;
 module.exports.redisPool    = 50;
 module.exports.redisIdleTimeoutMillis   = 10000;
 module.exports.redisReapIntervalMillis  = 1000;
+// allows to use an object to connect with node-postgres instead of a connection string
+//module.exports.db_use_config_object = true;
+// requires enabling db_use_config_object=true
+// allows to enable/disable keep alive for database connections
+// by default is not enabled
+//module.exports.db_keep_alive = {
+//    enabled: true,
+//    initialDelay: 5000
+//};
 module.exports.redisLog     = false;
 // Max number of entries in the query tables cache
 module.exports.tableCacheMax = 8192;
diff --git a/config/environments/test.js.example b/config/environments/test.js.example
index 4ed76558..a03f3a31 100644
--- a/config/environments/test.js.example
+++ b/config/environments/test.js.example
@@ -32,6 +32,15 @@ module.exports.db_pool_size = 500;
 module.exports.db_pool_idleTimeout = 30000;
 // Milliseconds between idle client checking
 module.exports.db_pool_reapInterval = 1000;
+// allows to use an object to connect with node-postgres instead of a connection string
+//module.exports.db_use_config_object = true;
+// requires enabling db_use_config_object=true
+// allows to enable/disable keep alive for database connections
+// by default is not enabled
+//module.exports.db_keep_alive = {
+//    enabled: true,
+//    initialDelay: 5000
+//};
 module.exports.redis_host   = '127.0.0.1';
 module.exports.redis_port   = 6336;
 module.exports.redisPool    = 50;