What value of backlog should I use?

backlog, c, listen, sockets

Solution

Basically, what the `listen()` backlog affects is how many incoming connections can queue up if your application isn't `accept()`ing connections as soon as they come in. It's not particularly important to most applications. The maximum value used by most systems is 128, and passing that is generally safe.

Problem

I read the man 2 listen. I don't understand what is the backlog value, it says The backlog argument defines the maximum length to which the queue of pending connections for sockfd may grow Right, how can I define what is the best value? Thanks

Original source