title: Settings Autoack true in Rabbitmq and celery
body: <p>I am using celery and rabbitmq , but due to pushing several task in queue my server memory  utilization becomes more than 40% , so that rabbit further will not accepting any task . so i want to delete those message which are already executed , but due to durable behavior of rabbitmq those message not automatically delete, so i want to set some configuration like autoAck=True , so that if message is consumed from celery ,it will delete from rabbitmq queues and also from my server memory. please explain how can we do that .</p>