Updated per @dalyd and @steveren reviews.

Author: Anthony Sansone

source/administration/production-notes.txt

@@ -559,8 +559,8 @@ possible, use XFS as it generally performs better with MongoDB.
    *on directories*. For example, HGFS and Virtual Box's shared
    folders do *not* support this operation.
 
-Set ``vm.swappiness`` at least ``1``
-````````````````````````````````````
+Set ``vm.swappiness`` to ``1``
+``````````````````````````````
 
 “Swappiness” is a Linux kernel setting that influences the behavior of
 the Virtual Memory manager when it needs to allocate a swap, ranging
@@ -571,7 +571,8 @@ from ``0`` to ``100``, inclusive.
 
 - A setting of ``100`` tells it to swap aggressively to disk.
 
-If your host runs kernel versions ``3.5`` or later, or ``2.6.32-303`` 
+If your host runs kernel versions ``3.5`` or later, or 
+:abbr:`RHEL (Red Hat Enterprise Linux)` / CentOS kernel ``2.6.32-303`` 
 or later, setting this value to ``0`` could disable swapping. Set this 
 to ``1``.
 
@@ -785,27 +786,42 @@ For all platforms, consider :ref:`virtualized-disks-scheduling`.
 :abbr:`AWS (Amazon Web Services)` :abbr:`EC2 (Elastic Compute Cloud)`
 `````````````````````````````````````````````````````````````````````
 
-- When available, enable :abbr:`AWS (Amazon Web Services)`
+There are two performance configurations to consider:
+
+- Reproducible performance for performance testing or benchmarking, and
+- Raw maximum performance
+
+To tune performance on :abbr:`EC2 (Elastic Compute Cloud)` for either 
+configuration, you should:
+
+- Enable :abbr:`AWS (Amazon Web Services)`
   `Enhanced Networking <http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/enhanced-networking.html#enabling_enhanced_networking>`_ 
   for your instance. Not all instance types support Enhanced Networking. 
 
   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 IOPS 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.
+- 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.
 
-- Disable hyperthreading, 
-  :abbr:`DVFS (dynamic voltage and frequency scaling)`, 
+- Disable :abbr:`DVFS (dynamic voltage and frequency scaling)` and
   :abbr:`CPU (central processing unit)` power saving modes.
 
   .. seealso::
 
-     - `Amazon blog post on disabling Hyper-Threading <https://aws.amazon.com/blogs/compute/disabling-intel-hyper-threading-technology-on-amazon-linux/>`_.
-
      - `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:
+
+- Disable hyperthreading.
+
+  .. seealso::
+
+     - `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.
 
 .. _windows-azure-production-notes: