No need to worry!
High-volume tests have shown that SAP IS-U/EDM can store and process the data of millions of EDM profiles while the performance of the processes remains excellent.
SAP EDM and SAP AMI Integration for Utilities have repeatedly been proven to provide very good performance even for high-volume scenarios.
Have a look at the test results, published on the SAP Service Marketplace (for SAP customers and partners):
AMI Performance Whitepaper
Large Volume Tests on SAP IDE Market Communication
