diff --git a/lib/classes/task/manager.php b/lib/classes/task/manager.php
index b7fd89c9054..fdf4e3eb96f 100644
--- a/lib/classes/task/manager.php
+++ b/lib/classes/task/manager.php
@@ -568,8 +568,7 @@ class manager {
 
         $where = '(nextruntime IS NULL OR nextruntime < :timestart1)';
         $params = array('timestart1' => $timestart);
-        $records = $DB->get_records_select('task_adhoc', $where, $params, 'nextruntime ASC, id ASC');
-
+        $records = $DB->get_records_select('task_adhoc', $where, $params, 'nextruntime ASC, id ASC', '*', 0, 2000);
         $records = self::ensure_adhoc_task_qos($records);
 
         $cronlockfactory = \core\lock\lock_config::get_lock_factory('cron');