Minimum 512 MB for Express, but at least 4 GB is highly recommended for the Developer edition to handle complex query engines.

Unlike the Express version (which is also free but limited to 4 cores, 1GB of RAM, and a maximum database size of 10GB), the Developer Edition has . It can utilize all available cores and memory on your development machine, ensuring your local tests closely mimic how the database would perform in a large-scale enterprise environment.