When should I use a database instead of a cache?

When should I use a database instead of a cache?

You should use a database when you need persistent storage and complex querying capabilities. Caches are best for temporary data.

Can you give me examples of when to use each?

Sure! Use a database for user accounts and transactions, while a cache is great for session data or frequently accessed API responses.

What are the performance implications of using one over the other?

Databases can be slower due to disk I/O, while caches are faster as they store data in memory. However, caches can lead to stale data if not managed properly.

How do I decide the right balance between them?

Consider your application's needs: if data consistency is critical, lean towards databases. For speed, use caches, but ensure you have a strategy for data freshness.