This function writes the specified error message to the server error log in synchronous fashion. This function does not return until the log message has been flushed to disk, thus blocking the server for the duration of the write operation. By default, the error log is $INSTANCE_PATH/logs/errors.
This function is turned off by default. Activate logging of the message with the dsconf set-log-prop command.
You can also manage logs using Directory Service Control Center.
Informational message are typically those that system administrators may ignore unless trying to debug server behavior. For errors, use slapi_log_error_ex() . For warnings, use slapi_log_warning_ex().