diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php
index 15636fb1e616e..5cc15cefb4927 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php
@@ -995,6 +995,7 @@ private function addCacheSection(ArrayNodeDefinition $rootNode)
                                         ->info('Overwrite the setting from the default provider for this adapter.')
                                     ->end()
                                     ->scalarNode('clearer')->end()
+                                    ->booleanNode('keep_in_memory')->defaultFalse()->end()
                                 ->end()
                             ->end()
                             ->validate()
diff --git a/src/Symfony/Component/Cache/DependencyInjection/CachePoolPass.php b/src/Symfony/Component/Cache/DependencyInjection/CachePoolPass.php
index b1af39755e0d6..703cc3ec639b8 100644
--- a/src/Symfony/Component/Cache/DependencyInjection/CachePoolPass.php
+++ b/src/Symfony/Component/Cache/DependencyInjection/CachePoolPass.php
@@ -13,6 +13,7 @@
 
 use Symfony\Component\Cache\Adapter\AbstractAdapter;
 use Symfony\Component\Cache\Adapter\ArrayAdapter;
+use Symfony\Component\Cache\Adapter\ChainAdapter;
 use Symfony\Component\DependencyInjection\ChildDefinition;
 use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
@@ -104,6 +105,18 @@ public function process(ContainerBuilder $container)
                 }
                 unset($tags[0][$attr]);
             }
+
+            if ($tags[0]['keep_in_memory'] ?? false) {
+                $container->register($id.'.keep_in_memory', ChainAdapter::class)
+                    ->setDecoratedService($id)
+                    ->addArgument([
+                        new Definition(ArrayAdapter::class),
+                        new Reference($id.'.keep_in_memory.inner'),
+                    ]);
+            }
+
+            unset($tags[0]['keep_in_memory']);
+
             if (!empty($tags[0])) {
                 throw new InvalidArgumentException(sprintf('Invalid "%s" tag for service "%s": accepted attributes are "clearer", "provider", "name", "namespace", "default_lifetime" and "reset", found "%s".', $this->cachePoolTag, $id, implode('", "', array_keys($tags[0]))));
             }