chore: config database timeout for production (#2035)

Signed-off-by: Miles Zhang <mingchang555@hotmail.com>

config/database.yml

@@ -21,14 +21,14 @@ default: &default
   # http://guides.rubyonrails.org/configuring.html#database-pooling
   host: <%= ENV.fetch("DB_HOST") { "localhost" } %>
   port: <%= ENV.fetch("DB_PORT") { "5432" } %>
-  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 25 } %>
+  pool: <%= ENV.fetch("DB_POOL")  { 5 } %>
   username: <%= ENV.fetch("DB_USERNAME") { "postgres" } %>
   password: <%= ENV.fetch("DB_PASSWORD") { "postgres" } %>
   reaping_frequency: 60 # every 60s check pool
   timeout: 5000 # over 5s will timeout
   variables:
-    statement_timeout: 120000 # query timemout over 120s
-    idle_in_transaction_session_timeout: 60000 # idle transaction over 60s
+    statement_timeout: 60000 # query timemout over 60s
+    idle_in_transaction_session_timeout: 120000 # idle transaction over 120s
 
 development:
   <<: *default
@@ -88,5 +88,5 @@ test:
 #     url: <%= ENV['DATABASE_URL'] %>
 #
 production:
+  <<: *default
   url: <%= ENV['DATABASE_URL'] %>
-  pool: <%= ENV["DB_POOL"] || ENV['RAILS_MAX_THREADS'] || 5 %>