CONNECTION_WRITE_BUFFER (Parameter)

Parameter: CONNECTION_WRITE_BUFFER

Definition

Do not use this parameter, except under SAP Support Team supervision or under specific recommendation provided within the SAP CC documentation

Description and Use

Caution

Do not change the value of this SAP CC system parameter in a productive landscape, except under the direct supervision of a support specialist from your SAP Support Team, an expert from your operations team, or under specific recommendation provided within the SAP CC product documentation.

This system parameter defines the number of write buffers used by a rater or a guider instance to send messages to a dispatcher instance for internal communications.

This parameter is used to control the data flow between instances in a running SAP CC system. For example, you can increase this parameter if a rater or a guider instance handles a large quantity of responses to send to a dispatcher instance.

Note

See the parameter CONNECTION_DISPATCHER_WRITE_BUFFER to tune the behavior of the dispatcher instances in a running SAP CC system.

System Configuration (Advanced): Tuning

Fine-Tuning the Parameter Value

The number of write buffers is by default set to 3. During the implementation project or the production operation phase, you can however change this value from 3 to 1,000 depending on the data flow between SAP CC system instances.

The metric 'ConnectionStatistics' can help you to determine the number of write buffers by indicating how much time has elapsed before an instance can write a message in an empty buffer. If this time increases, you must increase the number of write buffers.

Syntax and Constraints

Defined Constraints

The SAP CC Core Server system verifies the following constraints:

Instance Type	Constraint
Guider instances	The parameter must be less than or equal to 1000 . The parameter must be greater than or equal to 3 .
Rater instances	The parameter must be less than or equal to 1000 . The parameter must be greater than or equal to 3 .

Technical Details

For more information, consult this section.

Name

CONNECTION_WRITE_BUFFER

Do not use this parameter, except under SAP Support Team supervision or under specific recommendation provided within the SAP CC documentation

Category Parameter

Type Integer

Access (RO/RW)

RW(+): Dynamic Read / Static and Dynamic Write

An immediate change is possible but is temporary. When it is relevant, change the permanent settings used by the SAP CC Core Server system when it restarts.

Use the Admin+ user interface to change the runtime values or the permanent values of this system parameter in an instance of the SAP CC Core Server system or in multiple instances.

Groups

Instance Types

This system parameter is available in the following types of instances in a running SAP CC Core Server system:

guider, rater

Default Values (Factory Settings)

The predefined default values are:

Instance Type	Value
Guider	`3`
Rater	`3`

You can use a default value to reset the runtime value or the restart value (persistent) in the Admin+ user interface.

Note

A default value is part of the factory settings of the SAP CC Core Server systems. It differs from the original value set during the installation or after the Customizing activities.

In Admin+, you can reset a parameter value to this default value, but it is not recommended:

This value may differ from the original value set during the installation of your SAP CC system.
Note that it may also differ from the value defined by the implementation project team and set during the Implementation Phase of the integration project.

Verify the values in your running SAP CC systems before to use the reset command.

Constraints

The SAP CC system checks the following constraints:

Guider instances	The parameter must be less than or equal to 1000 . The parameter must be greater than or equal to 3 .
Rater instances	The parameter must be less than or equal to 1000 . The parameter must be greater than or equal to 3 .