Database Reference
In-Depth Information
Work Process
The SAP work process executes the individual dialog steps of the SAP ABAP request. The
architecture of the work process is designed so that limited numbers of work processes are
capable of supporting many concurrent users. The dispatcher collects the requests from the
SAP front end and forwards them to work processes for execution.
There are several different types of work processes in a SAP NW AS ABAP, and each
work process type has a specific function. The following section identifies the different
work process types and lists the responsibilities and configuration rules for each in an AS
ABAP system.
Dialog Work Process
The dialog work process executes dialog programs.
Rule:
There should be at least two.
Update Work Process
The update work process executes database updates. There are two kinds of update work
processes: U1 and U2. The U1 type executes primary and time-critical updates, such as pla-
cing an order or moving material. The U2 type executes secondary and noncritical updates,
such as statistical updates.
Rule:
There should be at least one.
Background Work Process
The background work process executes background jobs submitted to the application server.
Rule:
There should be at least one.
Spool Work Process
The spool work process executes spool requests submitted to the application server.
Rule:
There should be at least one.
Enqueue Work Process
The enqueue work process manages application locks.
Rule:
1. In systems with a heavy workload, greater than one enqueue work process is pos-
sible. OSS (Online Support System) Note 127773 provides additional details. OSS Notes
can be downloaded from the SAP Support Portal (http://service.sap.com/notes). Logging on
to the SAP Support Portal requires a user account issued by SAP to the customer employees
and consultants.
