I did a practical introduction to load testing, so I’ll introduce the reference materials I used for quick learning.

Introductory article: 負荷試験コトハジメ (Load Testing Basics)

First, I read 負荷試験コトハジメ by voluntas.

Introductory book: Amazon Web Services負荷試験入門 (Amazon Web Services Load Testing Introduction)

Amazon Web Services負荷試験入門 ――クラウドの性能の引き出し方がわかる：書籍案内｜技術評論社

That’s all from the Gemba about quick learning for a practical introduction to load testing.