What are the roll and page areas ?

- Roll and page areas are SAP R/3 buffers used to store
user contexts ( process requests ) . The SAP dispatcher assigns
process requests to work processes as they are received. If
the work process is unavailable the process requests are queued in the
roll and page areas.
Paging area holds data from the application programs.
Roll area holds data from previous dialog steps and data that characterizes user.