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This parameter controls the check made by the dispatcher on whether a dialog work process free is for processing HTTP(S)/SMTP calls. The number of available dialog work processes depends on the number of free dialog work processes and on the number of work processes that must be kept free for the dialog application.

For more information, see: rdisp/http_min_wait_dia_wp

If there is no free work process currently available for HTTP(S)/SMTP, the dispatcher places the request in the queue and processes it later.

This check protects the application server from being overloaded with HTTP(S)/SMTP requests.

The parameter rdisp/rfc_check performs the same checks but for RFC requests.


Work area



Integer value

Standard value


Dynamically changeable


Value Range and Syntax

The following values are permitted:

  • 0: The check is not made.

  • 1: The check is made, that is, the start of all HTTP/SMTP requests is monitored.

You can set the parameter dynamically in productive operation (transaction RZ11). Though these settings will be lost when the instance is started up the next time.

More Information

Note the following documentation associated with this parameter: