unable to set rabbitmq lazy queue - rabbitmq

Question

I have referred the link https://www.rabbitmq.com/lazy-queues.html here and set the rabbitmq queue to lazy queue using the following command
rabbitmqctl set_policy Lazy "^lazy-queue$" '{"queue-mode":"lazy"}' --apply-to queues
However, when checking it using the command curl -u guest:guest 'localhost:15672/api/queues' it still shows the default queue as below
"mode":"default" .
How do I set the queue to lazy queue in rabbitmq. Could someone please help

Answer 1

A Policy defines a rule that applies to all queues whose name matches a particular pattern.
Let's have a closer look at the command you've copied:
rabbitmqctl set_policy Lazy "^lazy-queue$" '{"queue-mode":"lazy"}' --apply-to queues
We are creating or updating a policy called "Lazy"; as far as I know, this can be any name you like
The pattern we want it to apply to is ^lazy-queue$; this is a regular expression which only matches the exact name "lazy-queue"
The configuration we want to apply is to set "queue-mode" to "lazy"
So, if you want it to apply to multiple queues, you need to adjust the policy to apply to those queues. For instance, you could apply it to all queues whose names begin "lazy-":
rabbitmqctl set_policy Lazy "^lazy-" '{"queue-mode":"lazy"}' --apply-to queues
Or any name that ends in a four-digit number:
rabbitmqctl set_policy Lazy "-[0-9]{4}$" '{"queue-mode":"lazy"}' --apply-to queues
Or just apply to every queue:
rabbitmqctl set_policy LazyEverything ".*" '{"queue-mode":"lazy"}' --apply-to queues