Please tell us max queue insert to database

[nhoctanker]

To day i check wp_queue Put in insert only 3 queue database

exmple I have 4 user : A , B , C ,D

wp_queue(userA) wp_queue(userB) wp_queue(userC) wp_queue(userD) // D not work

Realy code

wp_quue(New NOTIFICATIONALLUSER(users));

In notificationAllUser

foreach(users as user) wp_queue(new WP_Job_Notification($this->key, $this->message, $this->data,$user->ID,'promotion'));

but only three queue add to database