When Memory Becomes the Enemy

AI Engineer interview at Meta, and the interviewer asks:

“We all know KV Caching speeds up token generation. What’s the primary bottleneck this technique creates in a high-throughput production system, and how do you conceptually solve it?”

Don’t say: “It’s an optimization that stops the model from re-computing the Key/Value states for all previous tokens. It makes inference faster by reducing O(n^2) compute to O(n).”