50 Million Concurrent PubSub Connection Infrastructure @ Hotstar

Definitely should be less than 1M (MZBench latency computation sometimes has error and reports high latency, hence the high 1M upper bound here)
Consumer graph should reach SUBS (Consumer = Number of Subscriptions)
Messages Consumed = Messages Published * SUBS

Latency measurements are in microseconds. Single Node Tests
In these tests, we spawned a single instance of VerneMQ and EMQX to find their performance limits. In case there was a subscription done before the load test stopped, that client received those messages.

Source: blog.hotstar.com