如何为即时消息系统设计Redis发布/订阅？

与往常一样，您需要针对自己的用例对此类事情进行基准测试-
无法提供一般性建议。您可能需要增加系统范围内或redis用户的最大打开文件数。当然，这也适用于运行Web服务器的用户。

也就是说，您应该确保在用户离开时收听

socket.on('disconnect')

quit()

编辑： 快速检查后，我从991个订户后从Redis收到此错误消息：

Ready check failed: Error: Error: ERR max number of clients reached

这是默认值

redis.conf

# Set the max number of connected clients at the same time. By default# this limit is set to 10000 clients, however if the Redis server is not# able ot configure the process file limit to allow for the specified limit# the max number of allowed clients is set to the current file limit# minus 32 (as Redis reserves a few file descriptors for internal uses).## once the limit is reached Redis will close all the new connections sending# an error 'max number of clients reached'.## maxclients 10000

我的系统（Ubuntu
11.11）的默认

nofile

nofile

/etc/security/limits.{conf,d/*}

maxclients