What are the differences between LRU and LFU caching strategies in Redis?
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What are the differences between LRU and LFU caching strategies in Redis?
LRU (Least Recently Used) evicts the least recently accessed items, while LFU (Least Frequently Used) removes the least frequently accessed items.
Which one is better for performance?
It depends on your use case. LRU is generally better for workloads with temporal locality, while LFU is better for stable access patterns.
Can you give an example of when to use each?
Use LRU for caching web pages where recent access is more likely to be repeated. Use LFU for caching items like user preferences that are accessed less frequently but need to be retained.
How do I implement these in Redis?
You can set the maxmemory-policy in Redis to either allkeys-lru or allkeys-lfu to implement these strategies.
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