diff --git a/admin_manual/configuration_server/caching_configuration.rst b/admin_manual/configuration_server/caching_configuration.rst
index 424b8e8f8..e60675bbd 100644
--- a/admin_manual/configuration_server/caching_configuration.rst
+++ b/admin_manual/configuration_server/caching_configuration.rst
@@ -222,6 +222,12 @@ Use Redis for everything except local memcache::
        'port' => 6379,
         ),
 
+Additional notes for Redis vs. APCu on Memory Caching
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+APCu is faster at local caching than Redis. If you have enough memory, use APCu for Memory Caching
+and Redis for File Locking. If you are low on memory, use Redis for both.
+
 ..  _install_redis_label:     
         
 Additional Redis Installation Help