diff --git a/lib/base.php b/lib/base.php
index 5bab5d9f3f699..6240a7043aca8 100644
--- a/lib/base.php
+++ b/lib/base.php
@@ -18,6 +18,7 @@
 use OCP\Server;
 use OCP\Share;
 use OCP\User\Events\UserChangedEvent;
+use OCP\Util;
 use Psr\Log\LoggerInterface;
 use Symfony\Component\Routing\Exception\MethodNotAllowedException;
 use function OCP\Log\logger;
@@ -820,6 +821,15 @@ public static function init(): void {
 		register_shutdown_function(function () use ($eventLogger) {
 			$eventLogger->end('request');
 		});
+
+		register_shutdown_function(function () {
+			$memoryPeak = memory_get_peak_usage();
+			if ($memoryPeak > 300_000_000) {
+				$message = 'Request used more than 300 MB of ram: ' . Util::humanFileSize($memoryPeak);
+				$logger = \OCP\Server::get(LoggerInterface::class);
+				$logger->warning($message, ['app' => 'core']);
+			}
+		});
 	}
 
 	/**