System Log

The SAP System shows logs all system errors, warnings,runtime errors info, user locks due to failed logon attempts from known users,
and process messages in the system log. There are to two different types of logs created by the system log:

·  Local Logs
·  Central Logs

Use transaction SM21 to access the system log output screen. With this transaction, you can read any of the messages
that are contained in the system logs. You can modify the view to meet your needs.

Local Logs:

Each SAP System application server has a local log that receives all the messages output by this server.
The system log records these messages in a circular file on the server. When this log file reaches the
maximum permissible length, the system log overwrites it, starting over from the beginning.
(The location of the local log is specified in the rslg/local/file profile parameter.)

Central Logs:

We recommend that you also maintain a central log file on a selected application server.
Each individual application server then sends its local log messages to this server.
The server that you designate to maintain the central log collects the messages
from the other application servers and writes these messages to the central log.
The central log consists of two files: the active file and the old file.

slg/max_diskspace/local   -- Size of the log file in bytes     --- 10,000,000 (10 MB)
rslg/local/file           -- File name of the local log        --- LOG<system number>
rslg/max_diskspace/central-- Size of the central log file      --- 5000,000,000 (500 MB)