Only disconnect from db pool when size is increasing

Author: jturel

lib/dynflow/rails/configuration.rb

@@ -126,15 +126,18 @@ def increase_db_pool_size(world = nil)
         end
         if increase_db_pool_size?
           db_pool_size = calculate_db_pool_size(world)
-          ::ActiveRecord::Base.connection_pool.disconnect!
 
           base_config = ::ActiveRecord::Base.configurations.configs_for(env_name: ::Rails.env)[0]
           config = if base_config.respond_to?(:configuration_hash)
                      ::Dynflow::Utils::IndifferentHash.new(base_config.configuration_hash.dup)
                    else
                      base_config.config.dup
                    end
-          config['pool'] = db_pool_size if config['pool'].to_i < db_pool_size
+
+          return unless config['pool'].to_i < db_pool_size
+
+          config['pool'] = db_pool_size
+          ::ActiveRecord::Base.connection_pool.disconnect!
           ::ActiveRecord::Base.establish_connection(config)
         end
       end