ActiveMQ

-https://www.datadoghq.com/blog/activemq-architecture-and-metrics/

• https://github.com/tomitribe/JMS-1.1-PubSub-Queue-Example-with-ActiveMQ

• https://www.tomitribe.com/blog/5-minutes-or-less-activemq-with-jms-queues-and-topics/

• https://activemq.apache.org/components/classic/

Prefetch limit

• https://activemq.apache.org/what-is-the-prefetch-limit-for