Clustering will be the number 1 feature. It is also open-source so it is free. It can also be clustered, to allow fault tolerance.
PostgreSQL is open-source and cost-effective, supporting diverse database environments from small businesses to enterprises with robust performance for structured and unstructured data. While it offers seamless Oracle compatibility and data migration tools, installation is simple, yet integration with .NET and security features are limited. Performance can falter under heavy loads, lacking temporal SQL support, and memory management is less efficient compared to rivals like MySQL.