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update caching section of performance doc

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Carla Schroder 2015-06-01 16:03:00 -07:00
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admin_manual/configuration_server/performance_tuning.rst
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@ -61,8 +61,11 @@ performance. To do so, add the following to ``/etc/fstab``::
Caching
=======
Install the APC or Opcache bytecode cache. This example is for
CentOS/Red Hat/Fedora running PHP 5.4:
Caching improves performance by storing data, code, and other objects in
memory.
The APC or OPCache bytecode cache are commonly used in PHP environments. This
example installs APC on CentOS/Red Hat/Fedora systems running PHP 5.4:
.. code-block:: console
@ -74,24 +77,22 @@ On Ubuntu systems running PHP 5.4 this command installs APC:
$ sudo apt-get install php-apc
PHP 5.5 replaces APC with Opcache. Opcache is bundled with PHP 5.5 so it should
not be necessary to install it separately.
PHP 5.5 replaces APC with OPCache. OPCache is bundled with PHP 5.5 so it should
not be necessary to install it separately. OPCache improves PHP performance by
storing precompiled script bytecode in shared memory, thereby removing the need
for PHP to load and parse scripts on each request. This extension is bundled
with PHP 5.5.0 and later, and is available in PECL for PHP versions 5.2, 5.3,
and 5.4.
APC is both an opcode cache and data store. OPcache is only an opcode cache, so
for caching user data you should install APCu.
APC is both an opcode cache and data store. OPCache is only an opcode cache, so
for caching user data you should also install APCu.
The Redis key-value cache and store is an excellent fast and robust cache. For
configuration examples see :doc:`config_sample_php_parameters`.
Distributed PHP environments should use Memcached. Memcached servers must be
specified in the ``memcached_servers`` array in ownCloud's config file
``config.php``. For examples see :doc:`config_sample_php_parameters`
OPcache Extension
-----------------
OPcache improves PHP performance by storing precompiled script bytecode in
shared memory, thereby removing the need for PHP to load and parse scripts on
each request. This extension is bundled with PHP 5.5.0 and later, and is
available in PECL for PHP versions 5.2, 5.3, and 5.4.
``config.php``. For examples see :doc:`config_sample_php_parameters`.
Tuning System Parameters
========================