What is cache eviction and why is it important?

What is cache eviction and why is it important?

Cache eviction is the process of removing data from the cache to make room for new data. It's important because it helps manage limited cache space efficiently, ensuring that the most relevant data is available for quick access.

What are the different cache eviction policies?

Common cache eviction policies include Least Recently Used (LRU), First In First Out (FIFO), and Least Frequently Used (LFU). Each has its own advantages depending on the use case.

How does LRU work in cache eviction?

LRU keeps track of the order in which items are accessed. When the cache is full, it evicts the least recently used item to make space for new data.

Can cache eviction affect application performance?

Yes, improper cache eviction can lead to increased latency and reduced performance, as frequently accessed data may be evicted too soon.

What strategies can be used to optimize cache eviction?

Strategies include tuning the cache size, choosing the right eviction policy based on access patterns, and monitoring cache performance to adjust as needed.