如何将用户名从php session存储到nodejs中的socket.io库，并在页面刷新时断开socket连接。为什么？

I am making a chat application for my web job portal.I used to save user's name from php session to nodejs socket io library..I am confused..it is ok to store 10k users in socket object.if yes then how to maintain that users list? Another problem is when user navigates from one page to another..socket disconnect and again connect..Does it effect my application performance or nodejs server perform?I am making a chat application for my web job p