7.2.1 What happens behind a simple call?

Enabling call path monitoring for a Tuxedo client or application server allows you to find out all the information behind a simple tpcall/tpacall. The tracking points span multiple machines and multiple domains. You can clearly see the following information in the call path tree:

• The service invocation hierarchy that supports your call
• The transmission cost for each message flow step, from IPC Queue to Network
• The execution status of each service involved
• The call type and call flags of all the intermediate calls
• The waiting time in queue and response time for each service
• The end-to-end response time