Socket.io: How many concurrent connections can WebSockets handle?

This highly depends on your hardware configuration, what exactly are you doing/processing on the server side and if your system is optimized for many concurrent connections. For example on Linux machine by default you would probably first hit maximum number of opened files or other limits (which can be increased ) before running into hardware resources exhaustion or similar scalability issues. Key resource may be the amount of RAM which can be allocated by your node.

Js program to keep concurrent connections opened and ability to receive new ones.

This highly depends on your hardware configuration, what exactly are you doing/processing on the server side and if your system is optimized for many concurrent connections. For example on Linux machine by default you would probably first hit maximum number of opened files or other limits (which can be increased) before running into hardware resources exhaustion or similar scalability issues. Key resource may be the amount of RAM which can be allocated by your node.

Js program to keep concurrent connections opened and ability to receive new ones.

1 I guess the best method will be to bring my server down with loads of socket connections and see the stats. – Pono Apr 17 '11 at 19:12.

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