Memory Configuration for Amazon MQ RabbitMQ

Question

I am trying to configure an Amazon MQ broker (RabbitMQ engine). I started with the default configuration which only provides the following:
    # Default RabbitMQ delivery acknowledgement timeout is 30 minutes
    consumer_timeout = 1800000

I am trying to increase the "vm_memory_high_watermark" to 80% instead of the default 40% by setting the following:

vm_memory_high_watermark.relative = 0.8

When I save the configuration I get an error message saying that this element is unsupported:

Your configuration has been sanitized. Invalid and unsupported elements and attributes have been removed.Info
    Element: vm_memory_high_watermark.relative
    Reason: Unsupported element.

This is the case for all configurations I tried.
The [documentation for the RabbitMQ broker](https://docs.aws.amazon.com/amazon-mq/latest/developer-guide/rabbitmq-creating-applying-configurations.html) is very limited and the documentation for ActiveMQ doesn't work for RabbitMQ.

Is there an overview of what elements are configurable for RabbitMQ? Is there maybe another way how I can configure memory settings for RabbitMQ?

Answer

Hi Sandro,
Amazon MQ for RabbitMQ currently supports only two elements that are configurable using this broker configurations
1. consumer_timeout
2. management.restrictions.operator_policy_changes.disabled=false

Amazon MQ for RabbitMQ configuration policies - https://docs.aws.amazon.com/amazon-mq/latest/developer-guide/rabbitmq-configuration-policies.html

Other RabbitMQ broker configurations such as vm_memory_high_watermark are not configurable in Amazon MQ for RabbitMQ and use default configuration value for vm_memory_high_watermark.

RabbitMQ  https://www.rabbitmq.com/docs/production-checklist#resource-limits-ram

Thanks,
Vinodh

Memory Configuration for Amazon MQ RabbitMQ

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