refs #22792 いこーよ: リードレプリカの CPU 使用率を上げる

lib/active_record/connection_adapters/seamless_database_pool_adapter.rb

@@ -140,7 +140,6 @@ def #{method_name}(*args, &block)
             klass.class_eval <<-EOS, __FILE__, __LINE__ + 1
               def #{method_name}(*args, &block)
                 connection = @use_master ? master_connection : current_read_connection
-                ::Rails.logger.debug(connection.spd_connection_name)
                 proxy_connection_method(connection, :#{method_name}, :read, *args, &block)
               end
             EOS

lib/seamless_database_pool/controller_filter.rb

@@ -66,7 +66,7 @@ def use_database_pool(options)
     # a master connection block. It is made available just in case you have special needs that don't quite fit
     # into this module's default logic.
     def use_master_db_connection_on_next_request
-      #session[:next_request_db_connection] = :master if session
+      session[:next_request_db_connection] = :master if session
     end
 
     def seamless_database_pool_options
@@ -99,10 +99,10 @@ def perform_action_with_seamless_database_pool(*args)
     # Set the read only connection for a block. Used to set the connection for a controller action.
     def set_read_only_connection_for_block(action)
       read_pool_method = nil
-      #if session
-      #  read_pool_method = session[:next_request_db_connection]
-      #  session[:next_request_db_connection] = nil
-      #end
+      if session
+        read_pool_method = session[:next_request_db_connection]
+        session.delete(:next_request_db_connection) if session[:next_request_db_connection]
+      end
 
       read_pool_method ||= seamless_database_pool_options[action.to_sym] || seamless_database_pool_options[:all]
       if read_pool_method