Final answer:
The fully managed database that achieves single-digit millisecond latency with high performance workloads is Amazon Aurora.
Step-by-step explanation:
The fully managed database that would allow you to achieve a single-digit millisecond latency with high performance workloads is Amazon Aurora.
Aurora is a relational database offered by Amazon Web Services (AWS) that provides both high performance and low latency. It is compatible with MySQL and PostgreSQL, and it uses a distributed architecture to improve speed and performance.
Amazon Aurora is designed to handle high volumes of read and write requests with low latencies, making it suitable for applications that require real-time responsiveness and fast data access.