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SISNAPI (Siebel Internet Session application programming interface), a messaging format that runs on top of the TCP/IP protocol, is used for network communication between AOM and Siebel Web Server Extension (SWSE), installed on the Web server. SISNAPI connections can be configured to use encryption and authentication based on Secure Sockets Layer (SSL).
Each client session request opens a new connection and adds it to the pool, until the number of connections defined by the value of the parameter SessPerSisnConn have been created. Subsequent requests are then multiplexed over the existing pooled connections. SISNAPI connections persist until one of the following events occur:
SessPerSisnConn determines how many sessions can be multiplexed over a single SISNAPI connection. By default, SessPerSisnConn is set to 20 for AOM components. This figure is suitable for most deployments and generally does not need to be changed. You may set this differently, depending on how you have calculated think time. For details, see Performance Factors for AOM Deployments.
For more information about configuring MaxTasks and MaxMTServers, see Tuning AOM Components for CPU and Memory Utilization.
In each case, six SISNAPI connections will be created and pooled for each AOM multithreaded process, from each SWSE. Each Web server and SWSE may potentially have its own set of six connections, so the maximum total number of connections into an AOM process is six times the number of Web servers. In the first example above, 20 sessions would be multiplexed over each connection. In the second example, 18 would be multiplexed over each connection.
NOTE: In general, it is recommended that the figures used for the above formula be tailored to produce an end result that is an integer. To achieve this, you may need to modify how you define MaxTasks, MaxMTServers, and SessPerSisnConn.
Some Object Manager components are not AOM components. Configuration issues for such components may differ from that applicable to AOM components. For information about the EAI Object Manager, see Tuning Siebel EAI for Performance.
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