Which database is more scalable: Postgresql or MySQL?

When it comes to scalability, both Postgresql and MySQL are highly regarded relational database management systems. While there are a number of factors that can impact scalability, including hardware, network, and application design, both systems have features that make them highly scalable.

However, Postgresql is generally considered to be more scalable than MySQL, especially when dealing with large and complex data sets. This is due to a number of factors, including Postgresql's ability to handle a larger number of concurrent users, its support for advanced indexing and partitioning, and its ability to handle more complex queries.

Additionally, Postgresql is designed to be highly extensible, with a modular architecture that allows developers to easily add custom features and functionality. This means that it can be customized to meet the specific needs of a wide range of applications and use cases, making it a highly flexible and scalable option.