Use RAILS_MAX_THREADS as pool size on all adapters

When RAILS_MAX_THREADS is set, the postgresql adapter uses it as the
connection pool size, so that there are always enough connections
available to serve Action Cable requests.

The same logic applies when using any other adapter.

10 files changed, 10 insertions, 2 deletions

diff --git a/railties/lib/rails/generators/rails/app/templates/config/databases/frontbase.yml b/railties/lib/rails/generators/rails/app/templates/config/databases/frontbase.yml
index 34fc0e3465..917b52e535 100644
--- a/railties/lib/rails/generators/rails/app/templates/config/databases/frontbase.yml
+++ b/railties/lib/rails/generators/rails/app/templates/config/databases/frontbase.yml
@@ -8,6 +8,7 @@
 #
 default: &default
   adapter: frontbase
+  pool: <%%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
   host: localhost
   username: <%= app_name %>
   password: ''
diff --git a/railties/lib/rails/generators/rails/app/templates/config/databases/ibm_db.yml b/railties/lib/rails/generators/rails/app/templates/config/databases/ibm_db.yml
index 187ff01bac..d40117a27f 100644
--- a/railties/lib/rails/generators/rails/app/templates/config/databases/ibm_db.yml
+++ b/railties/lib/rails/generators/rails/app/templates/config/databases/ibm_db.yml
@@ -34,6 +34,7 @@
 #
 default: &default
   adapter: ibm_db
+  pool: <%%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
   username: db2inst1
   password:
   #schema: db2inst1
diff --git a/railties/lib/rails/generators/rails/app/templates/config/databases/jdbc.yml b/railties/lib/rails/generators/rails/app/templates/config/databases/jdbc.yml
index db0a429753..563be77710 100644
--- a/railties/lib/rails/generators/rails/app/templates/config/databases/jdbc.yml
+++ b/railties/lib/rails/generators/rails/app/templates/config/databases/jdbc.yml
@@ -38,6 +38,7 @@
 
 default: &default
   adapter: jdbc
+  pool: <%%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
   username: <%= app_name %>
   password:
   driver:
diff --git a/railties/lib/rails/generators/rails/app/templates/config/databases/jdbcmysql.yml b/railties/lib/rails/generators/rails/app/templates/config/databases/jdbcmysql.yml
index f2c4922e7d..a2b2a64ba6 100644
--- a/railties/lib/rails/generators/rails/app/templates/config/databases/jdbcmysql.yml
+++ b/railties/lib/rails/generators/rails/app/templates/config/databases/jdbcmysql.yml
@@ -11,6 +11,7 @@
 #
 default: &default
   adapter: mysql
+  pool: <%%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
   username: root
   password:
   host: localhost
diff --git a/railties/lib/rails/generators/rails/app/templates/config/databases/jdbcpostgresql.yml b/railties/lib/rails/generators/rails/app/templates/config/databases/jdbcpostgresql.yml
index 80ceb9df92..70df04079d 100644
--- a/railties/lib/rails/generators/rails/app/templates/config/databases/jdbcpostgresql.yml
+++ b/railties/lib/rails/generators/rails/app/templates/config/databases/jdbcpostgresql.yml
@@ -6,6 +6,7 @@
 default: &default
   adapter: postgresql
   encoding: unicode
+  pool: <%%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
 
 development:
   <<: *default
diff --git a/railties/lib/rails/generators/rails/app/templates/config/databases/jdbcsqlite3.yml b/railties/lib/rails/generators/rails/app/templates/config/databases/jdbcsqlite3.yml
index 28c36eb82f..371415e6a8 100644
--- a/railties/lib/rails/generators/rails/app/templates/config/databases/jdbcsqlite3.yml
+++ b/railties/lib/rails/generators/rails/app/templates/config/databases/jdbcsqlite3.yml
@@ -6,6 +6,7 @@
 #
 default: &default
   adapter: sqlite3
+  pool: <%%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
 
 development:
   <<: *default
diff --git a/railties/lib/rails/generators/rails/app/templates/config/databases/mysql.yml b/railties/lib/rails/generators/rails/app/templates/config/databases/mysql.yml
index 193423e84a..d987cf303b 100644
--- a/railties/lib/rails/generators/rails/app/templates/config/databases/mysql.yml
+++ b/railties/lib/rails/generators/rails/app/templates/config/databases/mysql.yml
@@ -12,7 +12,7 @@
 default: &default
   adapter: mysql2
   encoding: utf8
-  pool: 5
+  pool: <%%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
   username: root
   password:
 <% if mysql_socket -%>
diff --git a/railties/lib/rails/generators/rails/app/templates/config/databases/oracle.yml b/railties/lib/rails/generators/rails/app/templates/config/databases/oracle.yml
index 9aedcc15cb..d2499ea4fb 100644
--- a/railties/lib/rails/generators/rails/app/templates/config/databases/oracle.yml
+++ b/railties/lib/rails/generators/rails/app/templates/config/databases/oracle.yml
@@ -18,6 +18,7 @@
 #
 default: &default
   adapter: oracle
+  pool: <%%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
   username: <%= app_name %>
   password:
 
diff --git a/railties/lib/rails/generators/rails/app/templates/config/databases/sqlite3.yml b/railties/lib/rails/generators/rails/app/templates/config/databases/sqlite3.yml
index 1c1a37ca8d..9510568124 100644
--- a/railties/lib/rails/generators/rails/app/templates/config/databases/sqlite3.yml
+++ b/railties/lib/rails/generators/rails/app/templates/config/databases/sqlite3.yml
@@ -6,7 +6,7 @@
 #
 default: &default
   adapter: sqlite3
-  pool: 5
+  pool: <%%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
   timeout: 5000
 
 development:
diff --git a/railties/lib/rails/generators/rails/app/templates/config/databases/sqlserver.yml b/railties/lib/rails/generators/rails/app/templates/config/databases/sqlserver.yml
index 30b0df34a8..c223d6bc62 100644
--- a/railties/lib/rails/generators/rails/app/templates/config/databases/sqlserver.yml
+++ b/railties/lib/rails/generators/rails/app/templates/config/databases/sqlserver.yml
@@ -25,6 +25,7 @@
 default: &default
   adapter: sqlserver
   encoding: utf8
+  pool: <%%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
   reconnect: false
   username: <%= app_name %>
   password: