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Beike Product & Technology
Beike Product & Technology
Jul 1, 2021 · Backend Development

Understanding Node.js Asynchronous I/O Model and Its Impact on High‑Concurrency Performance

The article analyses a real‑world Node.js service outage caused by sudden 504 timeouts, explains how the asynchronous I/O model creates time‑slice contention under high QPS, presents load‑testing code and results for both I/O‑ and CPU‑bound requests, and offers practical mitigation strategies such as clustering, caching and resource scaling.

CPU BottleneckNode.jsasynchronous I/O
0 likes · 20 min read
Understanding Node.js Asynchronous I/O Model and Its Impact on High‑Concurrency Performance
Aikesheng Open Source Community
Aikesheng Open Source Community
Mar 19, 2020 · Databases

Analyzing High CPU Usage of lock_number_of_rows_locked in MySQL 5.6 Large Transactions

The article examines why a 100 GB MySQL 5.6 transaction causes high CPU usage during lock_number_of_rows_locked calculation, compares the lock‑counting implementations of MySQL 5.6 and 5.7, and offers diagnostic steps and version‑upgrade recommendations to mitigate the bottleneck.

CPU BottleneckInnoDBMySQL
0 likes · 9 min read
Analyzing High CPU Usage of lock_number_of_rows_locked in MySQL 5.6 Large Transactions