diff --git a/admin_manual/configuration_server/caching_configuration.rst b/admin_manual/configuration_server/caching_configuration.rst
index f5626b7a1..4cfe2a33d 100644
--- a/admin_manual/configuration_server/caching_configuration.rst
+++ b/admin_manual/configuration_server/caching_configuration.rst
@@ -222,7 +222,13 @@ Use Redis for everything except local memcache::
         ),
 
 ..  _install_redis_label:     
-        
+
+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.
+
 Additional Redis Installation Help
 ----------------------------------