@@ -406,7 +406,8 @@ kernel.cache_warmer
406406**Purpose**: Register your service to be called during the cache warming process
407407
408408Cache warming occurs whenever you run the ``cache:warmup`` or ``cache:clear``
409- task (unless you pass ``--no-warmup`` to ``cache:clear``). The purpose is
409+ task (unless you pass ``--no-warmup`` to ``cache:clear``). It is also run when
410+ handling the request, if it wasn't done by one of the commands yet. The purpose is
410411to initialize any cache that will be needed by the application and prevent
411412the first user from any significant" cache hit" where the cache is generated
412413dynamically.
@@ -423,7 +424,7 @@ the :class:`Symfony\\Component\\HttpKernel\\CacheWarmer\\CacheWarmerInterface` i
423424 {
424425 public function warmUp($cacheDir)
425426 {
426- // do some sort of operations to" warm" your cache
427+ //... do some sort of operations to" warm" your cache
427428 }
428429
429430 public function isOptional()
@@ -433,8 +434,9 @@ the :class:`Symfony\\Component\\HttpKernel\\CacheWarmer\\CacheWarmerInterface` i
433434 }
434435
435436The ``isOptional`` method should return true if it's possible to use the
436- application without calling this cache warmer. In Symfony 2.0, optional warmers
437- are always executed anyways, so this function has no real effect.
437+ application without calling this cache warmer. In Symfony, optional warmers
438+ are always executed by default (you can change this by using the
439+ ``--no-optional-warmers`` option when executing the command).
438440
439441To register your warmer with Symfony, give it the ``kernel.cache_warmer`` tag:
440442