config.yml

snc_redis:
  clients:
    doctrine_meta:
      type: phpredis
      alias: doctrine_meta
      dsn: redis://localhost/2
  doctrine:
    metadata_cache:
      client: doctrine_meta
      entity_manager: default          # the name of your entity_manager connection
      document_manager: default        # the name of your document_manager connection

paginator.php

use Doctrine\ORM\Tools\Pagination\Paginator;

$paginator = new Paginator($queryBuilder);
$totalRecords = $paginator->count();
$recordsForPage = $paginator->getIterator();

querybuilder.php

$queryBuilder
    ->setFirstResult($start)
    ->setMaxResults($limit);