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Trace Facility 
With the trace facility, you can trace various operations in your SAP System. You thus monitor the system and reduce the problems that occur.
You can use the trace facility to monitor the following operations in your system:
· SQL database accesses
For more information, refer to the SQL trace documentation in the BC - ABAP Workbench: Tools guide.
· ABAP programs
For more information, refer to the ABAP runtime documentation in the BC - ABAP Workbench: Tools guide.
· Internal operations in the SAP System and authorization check
You can use transaction ST01 for this (see System Traces).
· Traces generated by SAP processes (developer traces).
These are the trace files that are written by the individual host system processes. These trace files contain highly technical information for use in the event of problems in your System. For more information about this, see Developer Traces.
To access the trace facility, choose Tools ® Administration ® System Administrtion ® Monitor ® Traces.
