Glossary term
What is Cache? Meaning for developers
A fast copy of frequently used data. Example: Salt kept on the kitchen counter instead of in the storeroom.
Learn it properly · System DesignLesson 15: Caching Part 1: Where to Cache and WhyWhy ask the database the same question 10,000 times a second? What caches are, why they work so well, every layer you can cache at — browser to buffer pool — what to cache, and how Redis and Memcached compare.