As a data engineer, you are tasked with selecting an appropriate database solution for storing time series data related to CPU and memory usage across millions of computers. This data is collected in one-second interval samples. The database must support real-time, ad hoc analytics performed by analysts. Additionally, you need to ensure that the database and its schema design are cost-efficient, avoiding charges per query executed, and scalable for future dataset growth. Which database and data model would you choose to meet these requirements?