10 years of front‑line experience at leading firms (Xiaomi, Baidu, Meituan) in development, architecture, and management; discusses technology and life.
This article provides a step‑by‑step walkthrough of MySQL’s execution pipeline—from the client connection and parsing, through optimization, execution, undo/redo logging, change buffer handling, and binlog recording—illustrated with diagrams and detailed explanations of each component.
This article explains what a 502 Bad Gateway error means, why it is usually generated by a reverse‑proxy like nginx, and provides step‑by‑step methods to identify common causes such as backend timeouts, process crashes, and misconfigured upstream servers.
The author shares a step‑by‑step account of preparing a promotion presentation at Xiaomi, covering material structuring, rehearsal techniques, Q&A planning, and the “reset” mindset that helped turn a 4‑week effort into a successful Level‑17 promotion.
This article walks through essential techniques for building high‑concurrency systems, covering page static‑generation, CDN acceleration, caching layers, asynchronous processing with thread pools and MQ, sharding, connection pooling, read/write splitting, indexing, batch queries, clustering, load‑balancing, rate limiting, service degradation, failover, multi‑active deployment, stress testing, and monitoring.
This article walks through Spring's three‑level cache mechanism and source‑code flow that break circular dependencies, illustrating each step with a concrete demo, explaining the role of AOP, and showing why each cache level is necessary.
