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-.. _maintenance-tuning:
-
-========================
-Tuning server parameters
-========================
-
-If you are looking for methods to improve the performance of AtoM and your
-deployment, you are now in the right place!
-
-First of all, most common performance issues could be solved by redesigning the
-code, and that's something that we are working on constantly. But there's no
-doubt that some configuration tweaks in your servers can give you better
-results.
-
-This page describes the most common performance tweaks used in AtoM.
-
-
-PHP opcode cache
-================
-
-PHP is an interpreted language. Each time a client requests a PHP page, the
-server will read the source code and compile it before it's executed.
-`APC <http://php.net/manual/en/book.apc.php>`__ is one of the solutions
-available that caches the compiled output of each PHP script in order to save
-CPU cycles in subsequent requests.
-
-Deploying APC is really easy:
-
-.. code-block:: bash
-
-   sudo apt-get install php-apc
-
-We consider this component so important that it's listed as a mandatory
-extension under :ref:`installation-requirements`. Really, don't ignore this:
-we consider compiling the same source code again and again in a per-request
-basis to be a huge waste of time and computing resources.
-
-.. _maintenance-tuning-apc-stat:
-
-In addition, there is one particular directive in APC that you should tweak to
-get the best performance: ``apc.stat``, enabled by default, is a directive
-that forces APC to check the PHP scripts on each request to determine if they
-have been modified. Modifying PHP scripts may happen frequently in development
-environments, but in production you don't really need this. When you are
-upgrading AtoM, just restart the PHP pool and the APC cache will be flushed.
-
-.. note::
-
-   APC has not been ported to PHP 5.5. Instead, Zend has contributed their `Zend
-   Optimizer+ opcode cache (OPcache) <http://php.net/manual/en/book.opcache.php>`__.
-   However, user-data cache is not something that OPcache implements, so if you
-   are planning to use PHP 5.5 please look at APCu as a valid replacement for
-   user-land caching, which emulates its functionality while providing the same
-   API.
-
-
-Other components that can be tweaked
-====================================
-
-This document is work in progress. We are planning to describe more tweaking
-options in at least the following components:
-
-* MySQL
-* Nginx
-* PHP-FPM
-* Linux
-* Caching proxy servers (HTTP accelerators)
-* etc...