SAP RFC connections

The SAP agent uses Remote Function Calls (RFC) connections for internal Centralized Computing Center Management (CCMS) polling and CCMS alert data collection. This behavior is specific to the SAP RFC architecture.

The SAP agent opens one dedicated RFC connection to the SAP system that is monitored by the agent. The SAP system then opens one internal connection per application server for data collection through function modules and programs. If CCMS alerts are collected by the agent, the SAP system opens one more (system internal) RFC connection to each application server for this collection thread. When data collection starts, one RFC connection for the agent is opened. Then, up to twice the number of SAP application servers for more internal system RFC connections are opened.

You must ensure that the instance that is monitoring can accommodate the additional RFC sessions, especially in large systems with 10, or more instances. When the anticipated RFC load for monitoring might adversely affect system performance and tolerances, adjust the SAP profile parameter. Contact your SAP Administrator and see the following SAP Notes:

Terminal Sessions (default setting: 200) 22099
Communication/Gateway/Conversation Settings 887909 316877 384971