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SAP Workload Analysis: Average Database Time per Dialog Step (ms)

A large portion of the "dispatched" time in a dialog is due to the reading and changing of data in the database, This field stores the time required for processing logical database calls (calls to the SAP database interface).

Various factors influence the logical database access time. Read requests can be responded to either by the database buffer or the fast local SAP buffer. The buffer efficiency, the number of the required accesses, and a high number of DB change accesses influence the total access time.

The database access time is measured in the database interface in the application server. This is why this also includes part of the application server CPU time and the network transfer time.

SAP Workload Analysis: Average Usage of All Memory Types (KB)

The average memory usage is calculated by dividing the total memory usage by the number of associated dialog steps.

The total memory usage is made up of the components roll memory, extended memory and heap memory. Work processes use memory in the following order:

Roll Memory to the limit set by ztta/roll_first

Extended memory to limit set by ztta/roll_extension or until there is no more space available in extended memory.

Roll Memory: rest of the space in the roll area until ztta/roll_area.

Heap Memory until abap/heap_area_dia is reached or all space in heap memory is used.

For non-dialog work processes, there used to be an allocation order.

SAP Workload Analysis: Average Response Time per Dialog Step (ms)

Response time per dialog step

The response time of a dialog step is the time required for requesting the dialog from the dispatcher work process to the processing of the dialog through the ending of the dialog in the dispatcher and the transfer of the data to the presentation server.

This also includes the time used for "Roundtrips" to transfer data from the SAP R/3 frontend to the application server and back. This time is recorded as roll wait time on the application server, while it is displayed as GUI time on the frontend. For inefficient networks, such as WAN connections, this time can contribute significantly to the response time, although it uses no resources on the application server, as the context is rolled out and the work process is released.

The response time is usually split into wait time and "dispatched" time. The SAP response time is made up of the following components:

Response time = wait time + "dispatched" time

"Dispatched" time

= Generation times during the runtime

+ Load times for programs, screens, and GUI interfaces

+ Roll times for rolling in work data

+ ABAP processing times

+ Database time

+ Enqueue time for logical SAP locks

+ Roll wait time (not including task types RFC/CPIC/ALE).

The CPU time is not an additive component of the response time, but rather the sum of the CPU time used by the individual components. The CPU time is an independent additional piece of response time information.

SAP Workload Analysis: Average CPU Time per Dialog Step (ms)

The CPU of the application server is used during a dialog step for processing. This includes, for example, loading and generating objects or database queries as well as processing ABAP commands.

The operating system determines the CPU time. At the end of a transaction step, the SAP R/3 work process queries the operating system for CPU time used. The CPU time is not an additive part of the response time (unlike wait, roll in, load, and database times).

SAP Workload Analysis: Average Wait Time per Dialog Step(ms)


Average wait time per Dialog step

Under normal conditions, the dispatcher should immediately dispatch a dialog step to the work process, whereby the average wait time in the dispatcher process is a few milliseconds.

If there is a high load on the application server or the entire system, wait situations occur in the dispatcher queue. Factors influencing when wait times occur are the number of work processes on the application server and the CPU load (ST06 -> CPU: Load average).

SAP Workload Analysis: Average Roll Wait Time (ms)

During processing of some dialog steps, the user context may be rolled out, for example, during RFCs when the client is waiting for a response from the server. This wait in the roll area until the dialog step can continue is called the "roll wait time".

SAP Workload Analysis: Average Load and Generation Time (ms)

The load and generation time is the time required to load objects such as source code, GUI interfaces, and screen information from the database and generate these objects, if required.


For task type RFC, the roll wait time is not included in the response time.

SAP Workload Analysis: Average CPIC / RFC Time per Dialog Step (ms)

Average CPIC/RFC time per dialog step

For task types RFC/CPIC/ALE, this is only the time used in the CPIC/RFC interface.

For all other task types, the RFC processing time is added as well.