What are the downsides of using LFU caching?

What are the downsides of using LFU caching?

Some downsides of LFU caching include its complexity, potential for cache thrashing, and difficulty in implementation.

Can you explain what cache thrashing is?

Cache thrashing occurs when frequently accessed items are evicted from the cache, leading to increased cache misses.

How does LFU compare to LRU?

LFU focuses on the frequency of access, while LRU prioritizes the recency of access, which can lead to different performance outcomes.

Are there scenarios where LFU is preferred?

Yes, LFU can be beneficial in scenarios with stable access patterns where certain items are consistently accessed more than others.

What alternatives to LFU should I consider?

Alternatives include LRU, FIFO, and ARC, each with its own advantages depending on the use case.