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High throughput Erlang applications often get bitten by the fact that Erlang mailboxes are unbounded and will keep accepting messages until the node runs out of memory. In most cases, this problem can be solved by imposing a rate limit on the producers, and it is recommended to explore this idea before looking at this library. When it is impossible to rate-limit the messages coming to a process and that your optimization efforts remain fruitless, you need to start shedding load by dropping messages. PO Box can help by shedding the load for you, and making sure you won't run out of memory.

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Consul makes it simple for services to register themselves and to discover other services via a DNS or HTTP interface. Register external services such as SaaS providers as well. Includes failure detection, multidatacenter awareness, and kv storage.