The more important an application is within a company, the more critical its performance is. When migrating to the cloud, you should make sure from the outset that you offer your users the same or even better performance, so as not to generate the first negative user experience immediately after go-live. This could have a lasting negative impact on the reputation of the cloud among your users.
So the first thing to do is to create a careful sizing of your SAP landscape in the cloud. SAP's recommendations in the form of the PAM and the Certified and Supported SAP HANA® Hardware Directory as well as the certifications for SAP applications on the GCP should always be taken into account. It is also advisable to always check the current status.
The advantages of the cloud then come into play when sizing. In SAP on Cloud projects it is advisable to set up the servers somewhat larger than required by the sizing. For the first 1-3 months, the servers are then left in pay-as-you-go operation in order to be able to collect secured data on utilization in the new environment. Right-sizing is then performed based on this data. The possible changeover of the servers to a stronger or smaller server-class only requires a reboot. Only then are the servers committed and thus accepted by the cloud provider for a longer period and at lower conditions.