How I Architected a 99.9% Uptime RAG Stack with DeepSeek — 2026 Guide I lost sleep over a single p99 spike last March. Our retrieval-augmented generation pipeline was buckling under enterprise load, and when the latency histogram crossed the 800ms mark at the 99th percentile, our SLA started bleeding money. That night, I tore down the whole stack and rebuilt it around DeepSeek and Pinecone, routed through Global API, and I've been running it at 99.9% uptime ever since. Let me walk you through...