Configuring the SAP Gateway 
Purpose
As with all SAP programs, the SAP Gateway can be controlled by parameters. For example, you can use parameters to set the maximum number of CPI-C connections or gateway work processes.
The installation of a SAP Gateway for TCP/IP connections within an Instance of an SAP System is standard.
The SAP Gateway reads the parameters from the SAP profile file like another server (profile directory in the SAP Directory Tree).
Process flow
You can specify four different types of parameter value. Evaluation corresponds to the following hierarchy of priorities:
· Priority 1: Command line arguments.
These are only available for certain parameters, for example instance number.
· Priority 2: Instance profile.
Each instance has a specific profile. The instance profile is used to set the parameter values of an instance process.
The file name
of an instance profile follows the convention
<SAP System><instance>, for example CUAG45.
· Priority 3: Default profile in the SAP System.
The values in the default profile DEFAULT.PFL apply to the entire SAP system. All the instances in an SAP system access the default profile. However, if the parameter has already been set in the command line or in an instance profile, a parameter setting in the default profile will not take effect.
· Priority 4: Default values
There are pre-set values (defaults) for most parameters. Unless you specify a preferred value, each of these parameters accepts the default system value. Default values can only be pre-set by SAP.
Changes to parameter values only take effect when you restart the processes concerned.
Profile Parameters
The gateway profile parameters are valid in the standard system for the SAP gateway on supported platforms.
You can find a description of the most important gateway profile parameters under Parameterization of the SAP Gateway.
In an SAP System you can display all parameters with values by executing the program RSPFPAR or by starting the gateway monitor (Transaction SMGW or Administration System Administration Monitor System Monitoring Gateway Monitor), and then choosing Parameters Change or Display. If you choose Change Parameter, you can display documentation for each parameter.
You can maintain profile parameter values in the Computing Center Management System (CCMS). Choose Administration ® CCMS ® Configuration ® Profile Maintenance (transaction RZ10).
To display parameter properties and descriptions, use Transaction RZ11.