I hear the misconception that a server can only accept 65K connections or a server consumes a port for each accepted connection all the time. Here is a taste of some of them: A TCP/IP address only supports 65,000 connections, so you would have to have to assign around 30,000...

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There are 65535 TCP port numbers, does that mean only 65535 clients can connect to a TCP server? One might think that this places a hard limit on the number of clients that a single computer/application can maintain. The theoretical limit a server can support on a single port is 248 which is about 1 quadrillion.

1,000,000 Concurrent Connections

<p>Amazing article! I remember back when i was optimizing our physical servers in our datacenter pre-cloud era I end up doing similar optimization! At peak we were handling 2.5M req/sec but if I recall correctly concurrency was around  couple of hundreds of thousands and not a million!</p>


<p>Thanks for your knowledge of adjusting JVM parameters and networking.</p>
