4 files changed, 21 insertions, 2 deletions
diff --git a/actionpack/lib/abstract_controller/caching.rb b/actionpack/lib/abstract_controller/caching.rb
index a37ee9ec97..d222880922 100644
--- a/actionpack/lib/abstract_controller/caching.rb
+++ b/actionpack/lib/abstract_controller/caching.rb
@@ -34,6 +34,9 @@ module AbstractController
       config_accessor :perform_caching
       self.perform_caching = true if perform_caching.nil?
 
+      config_accessor :enable_fragment_cache_logging
+      self.enable_fragment_cache_logging = false
+
       class_attribute :_view_cache_dependencies
       self._view_cache_dependencies = []
       helper_method :view_cache_dependencies if respond_to?(:helper_method)
diff --git a/actionpack/lib/action_controller/log_subscriber.rb b/actionpack/lib/action_controller/log_subscriber.rb
index a0917b4fdb..739a11679b 100644
--- a/actionpack/lib/action_controller/log_subscriber.rb
+++ b/actionpack/lib/action_controller/log_subscriber.rb
@@ -59,14 +59,13 @@ module ActionController
        expire_fragment expire_page write_page).each do |method|
       class_eval <<-METHOD, __FILE__, __LINE__ + 1
         def #{method}(event)
-          return unless logger.info?
+          return unless logger.info? && ActionController::Base.enable_fragment_cache_logging
           key_or_path = event.payload[:key] || event.payload[:path]
           human_name  = #{method.to_s.humanize.inspect}
           info("\#{human_name} \#{key_or_path} (\#{event.duration.round(1)}ms)")
         end
       METHOD
     end
-
     def logger
       ActionController::Base.logger
     end
diff --git a/actionpack/test/controller/caching_test.rb b/actionpack/test/controller/caching_test.rb
index 08aa383886..5f4857c553 100644
--- a/actionpack/test/controller/caching_test.rb
+++ b/actionpack/test/controller/caching_test.rb
@@ -184,6 +184,7 @@ class FunctionalFragmentCachingTest < ActionController::TestCase
     @controller = FunctionalCachingController.new
     @controller.perform_caching = true
     @controller.cache_store = @store
+    @controller.enable_fragment_cache_logging = true
   end
 
   def test_fragment_caching
diff --git a/actionpack/test/controller/log_subscriber_test.rb b/actionpack/test/controller/log_subscriber_test.rb
index dfc0edea69..0deeb3865d 100644
--- a/actionpack/test/controller/log_subscriber_test.rb
+++ b/actionpack/test/controller/log_subscriber_test.rb
@@ -92,6 +92,7 @@ class ACLogSubscriberTest < ActionController::TestCase
 
   def setup
     super
+    @controller.enable_fragment_cache_logging = true
 
     @old_logger = ActionController::Base.logger
 
@@ -105,6 +106,7 @@ class ACLogSubscriberTest < ActionController::TestCase
     ActiveSupport::LogSubscriber.log_subscribers.clear
     FileUtils.rm_rf(@cache_path)
     ActionController::Base.logger = @old_logger
+    ActionController::Base.enable_fragment_cache_logging = true
   end
 
   def set_logger(logger)
@@ -258,6 +260,20 @@ class ACLogSubscriberTest < ActionController::TestCase
     @controller.config.perform_caching = true
   end
 
+  def test_with_fragment_cache_when_log_disabled
+    @controller.config.perform_caching = true
+    ActionController::Base.enable_fragment_cache_logging = false
+    get :with_fragment_cache
+    wait
+
+    assert_equal 2, logs.size
+    assert_equal "Processing by Another::LogSubscribersController#with_fragment_cache as HTML", logs[0]
+    assert_match(/Completed 200 OK in \d+ms/, logs[1])
+  ensure
+    @controller.config.perform_caching = true
+    ActionController::Base.enable_fragment_cache_logging = true
+  end
+
   def test_with_fragment_cache_if_with_true
     @controller.config.perform_caching = true
     get :with_fragment_cache_if_with_true_condition