Symfony2 and Doctrine APC Cache - symfony

Question

i have read the documentation of symfony2 in relation to the performance and I have realized the following steps.
Install APC 'php-apc' on my webserver and restart my webserver
Modify my doctrine configuration
doctrine:
dbal:
driver: "%database_driver%"
host: "%database_host%"
port: "%database_port%"
dbname: "%database_name%"
user: "%database_user%"
password: "%database_password%"
charset: UTF8
orm:
auto_generate_proxy_classes: "%kernel.debug%"
auto_mapping: true
metadata_cache_driver: apc
result_cache_driver: apc
query_cache_driver: apc
Now if i call a action to retrieve all users from database i see in the information bar at the bottom that doctrine execute every time 114 queries. Why the queries not cached?
My action look like this:
$users = $this->getDoctrine()->getRepository('AppUserBundle:User')->findAll();
return $this->render('AppUserBundle:User:index.html.twig', array('users' => $users));

Answer 1

Doctrine doesn't cache query results by default. You have to explicitly point that you want to cache query using useResultCache method. For example, if you'd like to cache getting all users, write your own method in User repository class:
use Doctrine\ORM\EntityRepository;
class UserRepository extends EntityRepository
{
public function fetchAll()
{
$query = $this->createQueryBuilder('u')->getQuery();
return $query->useResultCache(true)->getResult();
}
}
The method may take additional arguments:
public function useResultCache($bool, $lifetime = null, $resultCacheId = null)
$bool - set to true if you want to cache query result
$lifetime - TTL of cached result in seconds
$resultCacheId - you can pass your own id, in case of null Doctrine will handle that