SOA-C02 · Question #716
An ecommerce company uses an Amazon ElastiCache (Redis OSS) cluster for in-memory caching of popular product queries on a shopping website. The cache eviction policy is randomly evicting keys…
The correct answer is D. Change the eviction policy to evict the least frequently used keys. Switching the eviction policy to least frequently used (LFU) evicts the keys with the lowest access counts first, keeping popular (high-hit) items in memory and boosting the hit ratio - without adding cost or just extending TTLs.
Question
An ecommerce company uses an Amazon ElastiCache (Redis OSS) cluster for in-memory caching of popular product queries on a shopping website. The cache eviction policy is randomly evicting keys whether or not a TTL is set. A SysOps administrator must improve the cache hit ratio without increasing costs. Which solution will meet these requirements?
Options
- AAdd another node to the ElastiCache cluster.
- BIncrease the ElastiCache TTL value.
- CChange the eviction policy to randomly evict keys that have a TTL set.
- DChange the eviction policy to evict the least frequently used keys.
How the community answered
(50 responses)- A4% (2)
- B14% (7)
- C6% (3)
- D76% (38)
Explanation
Switching the eviction policy to least frequently used (LFU) evicts the keys with the lowest access counts first, keeping popular (high-hit) items in memory and boosting the hit ratio - without adding cost or just extending TTLs.
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