how many file descriptors can select() manage in python socket?

Question

when my multithread program run, a error thrown. I guess select() to have to manage file descriptor too much ,but not sure. Someone can explain to me. Thank you so much.

Answer 1

The problem is that select() usually has built-in limit on filedescriptors it can manage (1024 on most systems). Try poll or epoll, that might help.

Also note that select() uses unefficient algorithm to manage filedescriptors lookup. This algorithm has O(n) computational complecity, whilt epoll has O(1).