What are cache expiration policies and why are they important?

What are cache expiration policies and why are they important?

Cache expiration policies determine how long cached data is considered valid before it is refreshed or removed. They are crucial for ensuring that users receive up-to-date information while optimizing performance.

Can you explain the different types of cache expiration policies?

Sure! Common types include Time-to-Live (TTL), which sets a specific duration for cache validity, and Last-Modified, which checks if the data has changed since it was cached.

How do I choose the right expiration policy for my application?

Choosing the right policy depends on your application's needs. Consider factors like data volatility, user experience, and performance requirements.

What happens if I set the expiration time too short?

If the expiration time is too short, it can lead to frequent cache misses, increasing load times and server requests, which may degrade performance.

Are there any tools to help manage cache expiration?

Yes, many caching solutions like Redis and Varnish provide built-in features to manage cache expiration policies effectively.