How does in-memory caching improve the performance of applications in ElastiCache?
It improves application performance by deleting the requests that do not contain frequently accessed data.
It improves application performance by implementing good database indexing strategies.
It improves application performance by using a part of instance RAM for caching important data.
It improves application performance by storing critical pieces of data in memory for low-latency access.
Explanations:
This option suggests deleting requests that do not contain frequently accessed data, which does not align with the purpose of in-memory caching. Caching is about storing frequently accessed data to improve performance, not deleting requests.
This option mentions implementing good database indexing strategies, which is unrelated to in-memory caching. Indexing improves query performance in databases, while caching focuses on storing data in memory for quick access.
While this option states that instance RAM is used for caching, it does not fully explain the benefit of caching. Merely using RAM does not guarantee improved performance; it’s the quick access to cached data that matters.
This option accurately describes the benefit of in-memory caching. By storing critical pieces of data in memory, ElastiCache allows for low-latency access, significantly improving application performance compared to retrieving data from a slower disk-based database.
I gauge that the answer is:
It improves application performance by storing critical pieces of data in memory for low-latency access.