In an approach to improve the field of architecture generation by dynamically sizing computer system architecture requirements for virtual machines. Embodiments define static parameters and dynamic parameters for customer consuming resources of the computer system architecture and store data of the static parameters and dynamic parameters in data warehouse database (DWDB) tables. Further, embodiments compute, using the data of the DWDB tables, calculate the minimum, maximum, mean and standard deviation (SD) for the user count and the CPU and memory usage, and update the DWDB tables based on the minimum, maximum, and SD values per customer. Additionally, embodiments classify an architecture size associated with each of the customers, create a reference architecture for each of the one or more vertical industries and the architecture size, and optimize, by an analytical database, the computer system architecture provided to one or more customer based on the computed data of the DWDB for the one or more vertical industries.