celery突然连接不上rabbitmq server，结果找半天发现是rabbitmq卡的不行。。。

rabbitmq 设置web管理，添加用户

rabbitmqctl list_queues | grep notifications
rabbitmq-plugins enable rabbitmq_management

rabbitmqctl add_user mustang mustang

rabbitmqctl set_user_tags mustang administrator
rabbitmqctl set_permissions -p "/" mustang ".*" ".*" ".*"

测试磁盘速度

dd if=/dev/zero of=/tmp/output.img bs=8k count=256k;rm -rf /tmp/output.img

rabbitmqctl list_queues | grep notifications