Upgrading Queue Size(x-max-length)of an existing queue

[Ash M]

Hi,

RabbitMq Version is :  "RabbitMQ","3.6.6"

I am trying to upgrade the size of the queue , from x-max-length  : 2 to from x-max-length  : 7. When I try to set the x-max-length property using the following command

 rabbitmqctl set_policy ash-pol "^test-ash-q$" '{"x-max-length":7}' --apply-to queues 

I get the following error : 

Error: Validation failed

[{<<"x-max-length">>,7}] are not recognised policy settings

Question : x-max-length is a queue declaration argument, Can I update it after the queue is created?

Question : What  is the right approach to update the queue size? 

Thanks.

[anup anand]

The equivalent property for policy is 'max-length'.

Thanks

Anup

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[Ash M]

Thanks for answering. But this property does not have any effect. 
for example if my x-max-length while declaring the queue  is 2 and i set a policy with max-length - 7 with priority 1. It still takes only 2 message and queue lenght does not increase.

[anup anand]

You will be able to change queue properties only if they are implemented using policy. Try creating queue without x-max-length property. Add a policy to enforce max-length =2. Update policy to change max-length =7.

Thanks

Anup

[Ash M]

Thanks Anup, I was trying to avoid delete queue. Looks like I will have to delete the queue. Thanks Again!

[Ash M]

Is there a command to check size of the queue?

[Arnaud Cogoluègnes]

Please start a new thread for a new question.

There are several queue endpoints in tje HTTP API, they all contain information about queues, including number of messages.

If you use an AMQP client, the queue.declare method accepts a passive flag to check the existence of queue, the declare-ok response contains the number of messages in the queue. Clients usually provide an explicit queueDeclarePassive function that set the passive flag to true.

 

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[sasikala tholisam]

I want to create queue with x-max-length-bytes=int64(1000000000)
at the time of declaration of queue in golang..could you help me?

[Michael Klishin]

Use a policy and please do not post new questions to existing threads.

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MK

Staff Software Engineer, Pivotal/RabbitMQ