Debugging in CRM and ISU.

Hi All,

I am working in Middle ware Monitoring and having a good knowledge of ABAP.

When I am Creating any Business partner through web UI same business partner created in ISU automatically.

My question is that

* How to know, which function module is executed is ISU for creating same business partner.

* Can we stop debug control in ISU.

* In which table data is going to store in ISU.

Regards,

Arif