This parameter describes the contingent for the number of RFC users logged on to the SAP system. The parameter rdisp/tm_max_no specifies the absolute number of logons to the SAP system.


The RFC resource check is active (see rdisp/rfc_use_quotas).


Work area

Dispatcher/task handler


Integer value between 0 and 100 (percentage)

Standard value


Dynamically changeable

Local and on all servers

Value Range and Syntax

This parameter therefore describes the percentage of possible logons which, once exceeded, causes any further RFC logons to the server to be rejected.

SAP’s Recommendation

Open the User List (transaction SM04, see Display and Manage User Sessions) to see how many users are currently logged on to a server in the SAP system. The User List also displays whether each logon is a GUI or an RFC logon.


Let us assume that rdisp/tm_max_no is set to 100, and disp/rfc_max_login to 90. Once there are 90 logons on the system (whether they are GUI or RFC logons is not important), no more logons of the type RFC can be accepted.10 more logons of the type GUI can, however, still be accepted. Once the eleventh GUI logon attempt is made, the server returns the message “Maximum number of terminals reached”.