Server variables are associated with a single ColdFusion Server. They are available to all applications that run on the server. Use server variables for data that must be accessed across clients and applications, such as global server hit counts.
Server variables do not time out, but they are lost when the server shuts down. You can delete server variables.
Server variables are stored on a single server. As a result, you should not use server variables if you use ColdFusion on a server cluster.
You access and manipulate server variables the same way use Session and application variables, except you use the variable prefix Server.
Caution: To preserve data integrity, put code that uses server variables inside cflock
tags. You do not have to lock access to built-in server variables.
ColdFusion provides the following standard built-in read-only server variables: