應用程序性能測試藝術

內容概要

本書作者是一位有30年IT企業(yè)工作經驗和超過12年性能測試經驗的顧問。這本通俗易懂的書以真實的范例和配圖例證，同時提供實用的建議。 本書詳盡地解釋了一個不適當?shù)臏y試策略中的諸多缺陷，并提供了一套建全的、結構性的方法，以確保你的應用程序運作良好，并且在需要升級時能有效擴展。

作者簡介

Ian Molyneaux，Compuware公司Application Performance Assurance的EMEA SME（Subject Matter Expert，主題專家），在IT行業(yè)有超過30年的從業(yè)經驗。作為一名技術專家，他回避了和管理相關的內容。

書籍目錄

PREFACE1 WHY PERFORMANCE TEST?  What Is Performance?The End-User Perspective  Bad Performance:Why It's So Common Summary2 THE FUNDAMENTALS OF EFFECTIVE APPLICATION PERFORMANCE TESTING  Choosing and Appropriate Performance Test Environment  Setting Realistic and Appropriate Performance Targets  Making Sure Your Application is Stable Enough for Performance Testing  Obtaining a Code Freeze  Identifying and Scripting the Business-Critical Transactions  Providing Sufficient Test Data of High Quality  Ensuring Accurate Performance Test Design  Identifying the Server and Network Key Performance Indicators(KPIs)  Allocating Enough Time to Performance Test Effectively3 THE PROCESS OF PERFORMANCE TESTING  The Proof of Concept(POC)  From Requirements to Performance Test  Case Study 1:Online Banking  Case Study 2:Call Center  Summary4 INTERPRETING RESULTS:EFFECTUVE ROOT-CAUSE ANALYSIS  The Analysis Process  Types of Output from a performance Test  Root-Cause Analysis  Analysis Checklist  Summary5 APPLICATION TECHNOLOGY AND ITS IMPACT ON PERFORMANCE TESTING  Astbcgribiys Java and XML(AJAX)  Citrix  HTTP Protocol  Java  Oracle  SAP  Service-Orientated Architecture(SOA)  Web 2.0  Oddball Application Technologies:Help,My Load Testing Tool Won't Won't Record it!A TRANCTION EXAMPLESB POC AND PERFORMANCE TEST QUICK PEFERENCEC AUTOMAZ TOOL VENDORSD SAMPLE KPI MONITORING TEMPLATESE SAMPLE PROJECTINDEX

章節(jié)摘錄

插圖：Project time scales amounted to a week of lead time and three days to carry out the testingengagement.The client decided to outsource the entire testing project because of the shortschedule and lack of in-house testing expertise.The test environment required little preparation.since testing was to be carried out using thelive infrastructure.（More on this approach in Step 2.）Performance targets for online banking were limited to availability and concurrency.Theapplication had to be available and performant at a concurrent load of 1.000 virtual users.Asmentioned.the application was coping with approximately 380 concurrent users at peakperiods on a daily basis without problems.but this number was expected to increasesignificantly during the next year.Ten transactions were identified as core to the performance testing project.Input datarequirements amounted to a list of card numbers representing real user accounts and anaccompanying PIN number that provided an additional level of account security.Target datarequirements were unusually straightforward in that the live application databa.se was to beused with the caveat of no'write'or'update'transactions unless the transaction backed upany changes made to the database as its final action.The only performance test identified was a progressive ramp-up（without step）to the targetconcurrency of l，000 virtual users.Had more time been available.a ramp-up with stepvariation would have provided a more granular view of steady.state performance.Server and network KPIs focused on generic Windows performance metrics.There was norequirement to specifically monitor the application server or database layer.It subsequentlytranspired that application server monitoring would have been useful to identify poorlyperforming Java components whose presence had to be extrapolated from slow rendering ofclient-side content.

媒體關注與評論

“作者Ian在本書中恰到好處地主張了廠商無關（vendor-agnostic）方法論。他的案例研究為本書提供了大量衡量標準、圖片和背景資料，以具有說服力的方式傳遞給讀者。'最重要的是方法，而工具可以靈活選擇……'Ian的專業(yè)技能在整個閱讀體驗中可見一斑。”　　——Matt St.Onge，企業(yè)解決方案架構師，HCL Technologies America/Teradyne

編輯推薦

當今企業(yè)的生存與否取決于網絡應用和Web服務。由于程序的日趨復雜和迅速部署的壓力，許多從業(yè)人員不會花時間去保證程序的正常運行或有效擴展。《應用程序性能測試藝術》一書解釋了測試過程的完整生命周期，并展示了幫助您計劃、獲準、協(xié)調以及引導對應用程序的性能測試的最佳實踐。你將學習到如何：設定符合實際的性能測試目標，實施有效的應用程序性能測試策略，解析性能測試結果，使用自動化性能測試工具，測試傳統(tǒng)的本地應用程序、基于Web的應用程序及Web服務（SOA），識別并解決性能測試中常被忽視的問題。

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