С какими базами данных работаешь? Какой был максимальный объём хранимых данных?

I have worked with various databases, including relational and NoSQL:

• PostgreSQL — for complex transactional systems and analytics.
• MySQL — for high-load web applications.
• MongoDB — for document storage and flexible schemas.
• Redis — for caching and fast operations.

The maximum amount of data I have worked with reached several terabytes (for example, about 5 TB in PostgreSQL). This required query optimization, index tuning, table partitioning, and performance monitoring.

Example: In one project, the PostgreSQL database contained about 3 billion records, which required partitioning by date and efficient indexes to ensure acceptable response times.