Qunar Tech Salon
Feb 17, 2016 · Databases
Understanding 503 Errors and Database Bottlenecks: From Read‑Write Splitting to Caching, Vertical and Horizontal Sharding
The article explains that 503 errors under high concurrency are usually caused by database bottlenecks and outlines a systematic approach—including read‑write separation, caching with memcached, consistent hashing, vertical partitioning, and horizontal sharding—to improve website scalability and reliability.
503 errorMemcachedRead-Write Splitting
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