Components of Application Server in SAP

Components of Application Server:

1)      Dispatcher

2)      Work process (TSKH)

3)      Buffer area

4)      User Context

5)      DB Client

6)      Dedicated memory of CPU for work process

One Application Server can have only one Dispatcher.

One Dispatcher can handle 89 work processes.

One work process can handle 5 to 10 users.

Dispatcher:

The central process in the R/3 application layer is the dispatcher. Together with the operating system, the dispatcher controls the resources for the R/3 applications.

The main tasks of the dispatcher include distributing transaction load to the work processes, connecting to the presentation layer, and organizing communication.

INSTANCE:

1)      own /shared CPU  ------ sizing

2)      own/shared  memory -----  based on usage

3)      own buffer  -----------based on usage

4)      dispatcher ---each instance has only one

5)      work process and task handler -----depend upon configuration but not exceed

6)      DB client to interface with database ---75-150 MB of memory for one work process