SAP Basis

ADM100 Lesson: Trace Options
and AS/400 hosts. Technically, the system log is written to a ring buffer.
If this log file reaches the maximum permitted size, the system begins to
overwrite the oldest data.
Hint: The system does not display a message when an old log
file is replaced.
To display a log, choose Tools → Administration → Monitor → System Log or
call transaction SM21. By default, the system reads the log for the last one
to two hours. You can display system logs for other application servers
as well as the local system log in transaction SM21. To do this, choose
the menu path System Log → Choose → All Remote System Logs or System
Log → Choose →Central System Log.
By default, central logging is inactive on every application server.
Before you can activate central logging, you must ensure that the profile
parameters in the central system and on every instance are identical. The
system parameters for central logging start with the prefix rslg and can be
maintained in the instance profile or in the default profile.
• rslg/collect_daemon/host: Name of the node for the central log
• rslg/collect_daemon/listen_port: Listen port for the collection process
(default setting: 14< SAPSYSTEM number>)
• rslg/collect_daemon/talk_port: Talk port for the collection process
(default setting: 15< SAPSYSTEM number>)
• rslg/send_daemon/listen_port: Listen port for the send process (default
setting: 12< SAPSYSTEM number>)
• rslg/send_daemon/talk_port: Talkportforthesendprocess(default
setting: 13< SAPSYSTEM number>)
• rslg/send_daemon_autostart: Leave the value of this parameter set to 0.
Note: The listen ports and talk ports must be identical for all
instances in the SAP system.
The send process also uses the following system profile parameters. Do
not change the predefined values of these parameters:
• rslg/collect_daemon/exe_file: Specifies the executable file for the central
collection process.
• rslg/send_daemon/exe_file: Executablefileforthesendprocess
• rslg/send_daemon/pid_file: Identifies the file that is initialized when
the send process is started.
• rslg/send_daemon/status_file: Identifies the send process’s internal
status file.
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