Expose default value of database connection pool in generated database.yml

railties/configs/databases/mysql.yml

@@ -18,6 +18,7 @@ development:
   adapter: mysql
   encoding: utf8
   database: <%= app_name %>_development
+  pool: 5
   username: root
   password:
 <% if socket -%>
@@ -33,6 +34,7 @@ test:
   adapter: mysql
   encoding: utf8
   database: <%= app_name %>_test
+  pool: 5
   username: root
   password:
 <% if socket -%>
@@ -45,6 +47,7 @@ production:
   adapter: mysql
   encoding: utf8
   database: <%= app_name %>_production
+  pool: 5
   username: root
   password: 
 <% if socket -%>

railties/configs/databases/postgresql.yml

@@ -12,6 +12,7 @@ development:
   adapter: postgresql
   encoding: unicode
   database: <%= app_name %>_development
+  pool: 5
   username: <%= app_name %>
   password:
 
@@ -37,6 +38,7 @@ test:
   adapter: postgresql
   encoding: unicode
   database: <%= app_name %>_test
+  pool: 5
   username: <%= app_name %>
   password:
 
@@ -44,5 +46,6 @@ production:
   adapter: postgresql
   encoding: unicode
   database: <%= app_name %>_production
+  pool: 5
   username: <%= app_name %>
   password:

railties/configs/databases/sqlite2.yml

@@ -3,6 +3,7 @@
 development:
   adapter: sqlite
   database: db/development.sqlite2
+  pool: 5
 
 # Warning: The database defined as "test" will be erased and
 # re-generated from your development database when you run "rake".
@@ -10,7 +11,9 @@ development:
 test:
   adapter: sqlite
   database: db/test.sqlite2
+  pool: 5
 
 production:
   adapter: sqlite
   database: db/production.sqlite2
+  pool: 5

railties/configs/databases/sqlite3.yml

@@ -3,6 +3,7 @@
 development:
   adapter: sqlite3
   database: db/development.sqlite3
+  pool: 5
   timeout: 5000
 
 # Warning: The database defined as "test" will be erased and
@@ -11,9 +12,11 @@ development:
 test:
   adapter: sqlite3
   database: db/test.sqlite3
+  pool: 5
   timeout: 5000
 
 production:
   adapter: sqlite3
   database: db/production.sqlite3
+  pool: 5
   timeout: 5000