Reword

Author: javiereguiluz

cache.rst

@@ -194,20 +194,13 @@ You can also create more customized pools. All you need is an adapter:
                 default_memcached_provider: 'memcached://localhost'
                 pools:
                     my_cache_pool:
-                        provider: app.my_cache_chain_adapter
+                        provider: cache.adapter.filesystem
                     cache.acme:
                         adapter: cache.adapter.memcached
                     cache.foobar:
                         adapter: cache.adapter.memcached
                         provider: 'memcached://user:password@example.com'
 
-        services:
-            app.my_cache_chain_adapter:
-                class: Symfony\Component\Cache\Adapter\ChainAdapter
-                arguments:
-                    - ['@cache.array', '@cache.apcu', '@cache.my_redis']
-                    - 31536000 # One year
-                    
     .. code-block:: xml
 
         <!-- app/config/config.xml -->
@@ -250,9 +243,8 @@ You can also create more customized pools. All you need is an adapter:
             ],
         ]);
 
-
 The configuration above will create 3 services: ``my_cache_pool``, ``cache.acme``
-and ``cache.foobar``.  The ``my_cache_pool`` pool is using the ArrayAdapter
+and ``cache.foobar``.  The ``my_cache_pool`` pool is using the filesystem adapter
 and the other two are using the :doc:`MemcachedAdapter </components/cache/adapters/memcached_adapter>`.
 The ``cache.acme`` pool is using the Memcached server on localhost and ``cache.foobar``
 is using the Memcached server at example.com.