Can not visit the Web site, but do not have to restart the server can stay for a few minutes on a visit to …

My site is now one will be able to visit, but in the moment can not be visited, and nothing needs to be fixed, there was no need to restart the server what.What reasons?

may be caused by the excessive number of visitors taking up too much of the IIS
if the site is in the design of the use of excessive or framework of the Session will take up a lot of IIS to connect a number of general service providers to sell the 100m space of 50 to support the IIS and if the local system is XP, the system only 10 connections IIS!
IIS to connect a few too many will not cover it!
IIS is a certain period of time in which to connect the server to connect the hang inside! Like 20 minutes!
in the design of the site to be considered a good time to save resources!