icm/log_level is a SAP Parameter attribute which is used to control Level for syslog writing 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 .
You can use this parameter to specify whether ICM system log entries are
to be written to the trace file dev_icm. Following values are possible:
0: Do not write any system log entries to the trace file
1: Write all system log entries to the trace file
The default value of this parameter is 0, so that the trace file is not
filled with unnecessary entries (for example, connection terminations).
If you want all ICM system log entries to be written to the trace file,
set the parameter to 1.
See SAP Parameter Documentation for full SAP documentation for this profile parameter.