While SQLite is an excellent choice for local development and testing due to its simplicity, it often struggles under the load of a production environment. PostgreSQL offers superior concurrency handling, allowing multiple users to write to the database simultaneously without locking the entire file. This article explains the technical limitations of SQLite for high-traffic websites and provides a safe, step-by-step migration strategy for Django developers. We cover dumping your current data, configuring the psycopg2 adapter, and ensuring data integrity during the switch.