Python中的最大TCP连接数？ [英] Maximum number of TCP connections in Python?

问题描述

我正在localhost上使用Python工作。我写了一个原始服务器，只是读取TCP套接字，例如在端口50001中。

I am working in Python on localhost. I wrote a raw server just read TCP socket, say in port 50001.

然后，我尝试了最大客户端连接：

Then I tried max client connections:

def rawMultiConn(threadnum = 10000):
    g_event = threading.Event()
    def threadfn():
        sockets = [socket.socket(socket.AF_INET, socket.SOCK_STREAM)
                   for i in range(threadnum)]
        for s in sockets:
            s.connect(('localhost', SERVER_PORT))
        g_event.wait()
        for s in sockets: s.close()

    t = threading.Thread(target = threadfn)
    t.start()
    g_event.set()
    t.join()

，但是经过约3000个连接后，发生异常：

but after about 3000 connections, exception occurs:

[Errno 10055]无法对套接字执行操作，因为
系统缺少足够的缓冲区空间或队列

[Errno 10055] An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full

那么我该如何解决它并最大化连接？

So how can I resolve it and max the connection?

推荐答案

检查 ulimit 和 quota ，表示该框和运行脚本的用户。 /etc/security/limits.conf 也可能包含您可能想要修改的资源限制。

Check the ulimit and quota for the box and the user running the script. /etc/security/limits.conf may also contain resource restrictions that you might want to modify.

尝试运行 ulimit -s无限制。

另外， ulimit -n 将显示允许的打开文件描述符/套接字的最大数量。

Also, ulimit -n will show the max number of open file descriptors/sockets allowed. That may need modification as well.

一些手册页和参考链接：

• ulimit


• quota


• limits.conf


• lsof

• ulimit
• quota
• limits.conf
• lsof

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