MongoDB Architecture and Performance Optimizations for Tencent Cloud K‑Song Feed Service
The article details how Tencent Cloud’s K‑Song feed service, serving over 150 million daily users, was engineered with a read‑expansion model, cached results, auxiliary index tables, hashed sharding, write‑concern tuning, disabled chain replication, and WiredTiger and backup optimizations, achieving sub‑10 ms write latency and significantly lower CPU and slow‑query rates.
