Updated per @dalyd review.

Author: Tony Sansone

source/administration/production-notes.txt

@@ -801,26 +801,27 @@ configuration, you should:
   To learn more about Enhanced Networking, see to the 
   `AWS documentation <http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/enhanced-networking.html#enabling_enhanced_networking>`_.
 
-- Use provisioned :abbr:`IOPS (Input/Output Operations Per Second)` for 
-  the storage, with separate devices for journal and data. Do not use
-  the ephemeral storage available on some instance types as their
-  performance changes moment to moment.
+If you are concerned more about reproducible performance on 
+:abbr:`EC2 (Elastic Compute Cloud)`, you should also:
+
+- Use provisioned :abbr:`IOPS (Input/Output Operations Per Second)` 
+  for the storage, with separate devices for journal and data. Do not 
+  use the ephemeral (:abbr:`SSD (Solid State Disk)`) storage available 
+  on most instance types as their performance changes moment to moment.
+  (The ``i`` series is a notable exception, but very expensive.)
 
 - Disable :abbr:`DVFS (dynamic voltage and frequency scaling)` and
   :abbr:`CPU (central processing unit)` power saving modes.
 
   .. seealso::
 
-     - `Amazon documentation on Processor State Control <https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/processor_state_control.html>`_
-
-If you are concerned more about reproducible performance on 
-:abbr:`EC2 (Elastic Compute Cloud)`, you should also:
+     `Amazon documentation on Processor State Control <https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/processor_state_control.html>`_
 
 - Disable hyperthreading.
 
   .. seealso::
 
-     - `Amazon blog post on disabling Hyper-Threading <https://aws.amazon.com/blogs/compute/disabling-intel-hyper-threading-technology-on-amazon-linux/>`_.
+     `Amazon blog post on disabling Hyper-Threading <https://aws.amazon.com/blogs/compute/disabling-intel-hyper-threading-technology-on-amazon-linux/>`_.
 
 - Use ``numactl`` to bind memory locality to a single socket.