What is the largest database size you have had to manage or work with?

The size of the database I had to work with depends on the project and infrastructure. For example, in one project, I worked with a PostgreSQL database of about 500 GB, where optimizing queries and indexes for fast data access was important. In another case — with MongoDB, where the data volume reached several terabytes, and sharding and replication were used for scaling and fault tolerance.

Key points when working with large databases:

• Query and index optimization
• Caching
• Scaling (sharding, replication)
• Performance monitoring

Regarding Python, for working with large databases, ORM with support for lazy loading and pagination are often used to avoid loading too much data into memory at once.