diff --git a/application/config/config.sample.php b/application/config/config.sample.php
index 15c3cb3c7..05347d6b8 100644
--- a/application/config/config.sample.php
+++ b/application/config/config.sample.php
@@ -433,7 +433,7 @@ $config['error_views_path'] = '';
 |
 */
 $config['cache_path'] = '';
-$config['cache_adapter'] = 'file';
+$config['cache_adapter'] = 'apcu';
 $config['cache_backup'] = 'file';
 $config['cache_key_prefix'] = '';
 
diff --git a/install/config/config.php b/install/config/config.php
index 1e4ad582d..c184abb70 100644
--- a/install/config/config.php
+++ b/install/config/config.php
@@ -433,7 +433,7 @@ $config['error_views_path'] = '';
 |
 */
 $config['cache_path'] = '';
-$config['cache_adapter'] = 'file';
+$config['cache_adapter'] = 'apcu';
 $config['cache_backup'] = 'file';
 $config['cache_key_prefix'] = '';