rdisp/TRACE_COMPS is a SAP Parameter attribute which is used to control Enable/disable trace for components information. This is available within R/3 SAP systems depending on the version and release level.
Below is the standard documentation available and a few details of the attributes values .
In the SAP system, there is a developer trace file for each work
process. You can activate and deactivate the components individually.
You can change the trace level and trace components at runtime using the
program dpmon or with transaction SM50.
For performance and compatibility reasons, you can still set the global
trace level (
The status of the components is controlled using rdisp/TRACE_COMPS as
follows. Component X
Is inactive if the code letter is not in the string (no trace at all)
Writes the trace only to level 1 (error) if the component is contained
in the string only as a lowercase letter
Writes the trace with a higher level, if the component is contained in
the string as an uppercase letter (and
Examples
rdisp/TRACE_COMPS =all, M
means
All components to level 1, thereafter only task handler components. This
is also the default setting.
rdisp/TRACE_COMPS =All, ads
means
All components up to the highest level, but not diag, ABAP, or spool.
Caution
If the parameter does not work as intended, formulate the string so that
it begins with all or All.
Background
There is an area in shared memory for each work process, in which the
current trace level and trace string is stored, and another area in
which any new values can be entered using ABAP or the program "dpmon".
The work process adopts these values when it starts its next job.
If you want to force the work process to adopt the values immediately
(only in exceptional cases; loops and so on are required ), you first
need to change the values in shared memory (using ABAP or dpmon) and
then send a signal to the work process using "kill -USR1 <(><<)>pid>"
(or USR2). If the signal handling does not find any values for
level/string in shared memory, it reacts as previously, that is, USR1
lowers the level by 1, USR2 increases the level by 1.
Trace logging allows you to control the trace for the selected
components. The corresponding parameters are listed below.
See SAP Parameter Documentation for full SAP documentation for this profile parameter.