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Prerequisites

You can only switch on the Performance Trace for a single instance. You should already have decided the scope and targets of your performance analysis.

Procedure

To analyze a trace file, do the following:

Choose the menu path Test ® Performance Trace in the ABAP Workbench. The initial screen of the test tool appears. In the lower part of the screen, the status of the Performance Trace is displayed. This provides you with information as to whether any of the Performance Traces are switched on and the users for which they are enabled. It also tells you which user has switched the trace on.


1. Using the selection buttons provided, set which trace functions you wish to have switched on (SWL trace, enqueue trace, RFC trace, table buffer trace).
2.

If you want to switch on the trace under your user name, choose Trace on. If you want to pass on values for one or several filter criteria, choose Trace with Filter. Typical filter criteria are: the name of the user, transaction name, process name, and program name.
3. Now run the program to be analyzed.

You will normally analyze the performance trace file immediately. In this case, it is a good idea to use a separate session to start, stop, and analyze the Performance Trace
If you are shown trace kernel errors on the initial screen (for example, not enough storage space available), you must first remove the errors or have them removed by your system administrator.
The selected trace types can be changed as required during a performance trace interval (time between switching on and off the trace). The user (user group) must remain unchanged.

Result

The results of the trace recording are written to a trace file. If trace records are overwritten during the trace interval, the system displays a message to inform you when you analyze the trace file.
The results of the trace recording are stored to ten trace files. Overwriting trace records, however, cannot be entirely excluded in this case either.

The Performance Trace records all database access calls, table buffer calls, remote calls, or calls for user lock activity. These measurements can affect the performance of the application server where the trace is running. To preserve system performance, you should therefore turn off the trace as soon as you finish recording your application.


Stopping the Trace

Prerequisites


You have started the trace and finished running the program that you want to analyze. For performance reasons, you should switch off the traces as soon as you have finished recording.

Procedure


To deactivate the trace:

1. Choose Test ®Performance Trace in the ABAP Workbench. The initial screen of the test tool appears. It contains a status line displaying the traces that are active, the users for whom they are active, and the user who activated them.
2. Select the trace functions that you want to switch off.
3. Choose Deactivate Trace. If you started the trace yourself, you can now switch it off immediately. If the performance trace was started by a different user, a confirmation prompt appears before deactivation-

Result

The results of the trace are stored in one or more trace files. You can then analyze the performance data stored in the trace file. See also, Analyzing Performance Data.
Analyzing Performance Data
Prerequisites

Once you have switched off the performance trace, you can analyze the data The data is analyzed, even repeatedly, until its trace records are overwritten in the trace file. The trace files are managed by the SAP system. You can therefore keep a trace file for editing and delete it later through the menu Performance Trace->Save Trace, Display Saved Trace, and Delete Saved Trace.


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