July 2024
Beginner to intermediate
272 pages
5h 40m
Japanese
Content preview from アーキテクトの教科書 価値を生むソフトウェアのアーキテクチャ構築
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227
5
負荷の生成
負荷テストシナリオに沿った実際の負荷は、Gatling
※ 14
のような負
荷テストツールを利用して生成します。多くの負荷テストツールでは、
ブラウザの操作をキャプチャーしてスクリプトとして出力することが可
能です。出力されたスクリプトに編集を加えて、望ましい負荷が生成さ
れるように調整を行います。Gatlingの場合は、JavaやKotlin、Scala
を用いてスクリプトを記述することができます。
計測
レスポンスやスループット、エラー発生率などの統計情報は、負荷テ
ストツールが備えるレポート機能により確認することができます（図
5.3.3
※ 15
）。負荷テスト結果の分析や評価を行うためには、それ以外に
サーバー側のリソース状況も取得する必要があります。有償の負荷テス
トツールの中には、サーバー側のリソース状況を取得しメトリクスを統
合する機能を有するものも存在しますが、そうでない場合は事前にメト
リクス収集の準備をしておきます。具体的には、Linuxであればtopや
vmstatなどのコマンド、Windowsであればパフォーマンスモニター
を使用し、CPU使用率やメモリ使用状況、I/Oの使用状況などをOS
レベルやプロセスレベルで確認できるようにします。また、アプリケー
ションサーバーやデータベースサーバーのようなミドルウェアのメトリ
クスも取得しておくべきです。たとえばスレッド数やコネクション数な
どの情報です。
⹅
図5.3.3
Gatlingのレポート
出典：Gatling documentation ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.