diff --git a/src/DataCollector/CacheCollector.php b/src/DataCollector/CacheCollector.php
index 307996e6..e83773e2 100644
--- a/src/DataCollector/CacheCollector.php
+++ b/src/DataCollector/CacheCollector.php
@@ -28,6 +28,7 @@ public function __construct($requestStartTime, $collectValues)
         parent::__construct();
 
         $this->collectValues = $collectValues;
+        $this->memoryMeasure = true;
     }
 
     public function onCacheEvent(CacheEvent $event)
@@ -38,6 +39,8 @@ public function onCacheEvent(CacheEvent $event)
         $label = $this->classMap[$class];
 
         if (isset($params['value'])) {
+            $params['memoryUsage'] = strlen(serialize($params['value'])) * 8;
+
             if ($this->collectValues) {
                 $params['value'] = htmlspecialchars($this->getDataFormatter()->formatVar($event->value));
             } else {