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Limit Values for Resource Retrieval for the Asynchronous RFC

If any of the following criteria is not met, no resources are made available for parallel processing with asynchronous RFC (or triggered by the system in the case of the exception RESOURCE_FAILURE):

  • Number of available dialog work processes: 1
    This standard value is 1 and can be set using the profile parameter rdisp/rfc_min_wait_dia_wp. By default, a certain number of dialog work processes is kept free as a reserve instance for other purposes, for example system logon or administration programs.
    Therefore, more dialog processes must be free than the value of the profile parameter rdisp/rfc_min_wait_dia_wp specifies.
  • Percentage of user-specific dialog work processes: 75%
    This standard value can be changed using the profile parameter rdisp/rfc_max_own_used_wp. The number of dialog work processes is specified with the profile parameter rdisp/wp_no_dia.
  • Percentage of waiting requests in dialog queue: 5%
    This standard value (5% of the total length of the dialog queue) can be changed using the profile parameter rdisp/rfc_max_queue.
    The length of the dialog queue is set with the profile parameterrdisp/elem_per_queue.
  • Percentage of logons to the system: 90%
    If the percentage of logged on users is higher, no resources are released.
    This standard value can be changed using the profile parameter rdisp/rfc_max_login.
    The maximum number of logons on a server is set with the profile rdisp/tm_max_no.
  • Percentage of own logons to system: 25%
    This standard value (25% of all logons) can be changed using the profile parameter rdisp/rfc_max_own_login. For every RFC there is a logon in the target system.
  • Percentage of used communication entries: 90%
    Each server has a limited number of communication channels. The standard limit value is 90 per cent.
    This value can be changed using the profile parameter rdisp/rfc_max_comm_entries. The maximum number of communication channels is set using the profile parameter rdisp/max_comm_entries. For every connection, one entry each is made for the client and the server.

Other versions: 7.31 | 7.40 | 7.54

Further Information

Further information about the configuration of system resources for RFC can be found in SAP Library under:

  • Configuration of System Resources for RFC