为什么我的nodejs应用程序的会话在windows服务器上的40秒内过期

我在windows服务器上部署了我的应用程序,在本地机器上运行良好,我在三台不同的本地机器上尝试过,运行良好。服务器是.net托管的,托管公司具有启用我已经启用的nodejs应用程序的功能

在执行任何操作之前检查会话的代码

// middleware function to check for logged-in users
  var sessionChecker = function(req, res, next) {
    if (req.session.user && req.cookies.user_sid) {
      next();
    } else {
     res.redirect("/")
    }    
  };

9/11/2018 11:05:54 pm a worker process with process id of '3820' serving 
application pool has requested a recycle because 
it reached its virtual memory limit. 

9/11/2018 11:04:54 pm a worker process with process id of '9580' serving 
application pool has requested a recycle because 
it reached its virtual memory limit.

9/11/2018 11:03:54 pm a worker process with process id of '1720' serving 
application pool has requested a recycle because 
it reached its virtual memory limit. 

之后,我在ChromeDevTools的本地机器上调试了我的应用程序,即使一次也不会占用超过30MB的内存