Lesson 04 · 12 min
Databases under load: replicas, sharding, consistency
How to offload reads, split writes, and what you will have to give up.
12 minLesson 4 of 10Practice includedAsk AI on any point
Application servers scale easily because they have no state. The database has state, so it is almost always the first bottleneck. The usual order is: indexes and query tuning, a cache, read replicas, and only then sharding.
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