Duration between Preprocessing and Downtime phase

Hello All,

We are currently upgrading our system from SAP ECC 6.0 EHP4 to EHP5. To reduce the performance issues caused to our production system due to the preprocessing phase running inthe background during productive use, we are planning to complete the Preprocessing phase over one weekend and start the Downtime phase during the subsequent weekend.

Though logically I think we can do it, can anyone confirm if there could be any issues by seperating the end of the Preprocessing phase and start of the downtime phase by a week?

Let me know what precautions we need to take in case if this is possible.

Thanks

D