Cloud Profiler 是具有統計功能的低負擔分析器，可持續從實際工作環境中的應用程式收集 CPU 使用狀況和記憶體分配資訊；且可將這些資訊按產生該資訊的原始碼歸類，協助您識別使用最多資源的應用程式部分，並進一步掌握應用程式的效能特性。如需詳細總覽，請參閱 Cloud Profiler 說明文件中的「剖析概念」。
如要擷取最新支援 Java 執行階段的剖析資料，請參閱「剖析 Java 應用程式」。
運用 Cloud Profiler 瞭解效能
除非另有註明，否則本頁面中的內容是採用創用 CC 姓名標示 4.0 授權，程式碼範例則為阿帕契 2.0 授權。詳情請參閱《Google Developers 網站政策》。Java 是 Oracle 和/或其關聯企業的註冊商標。
上次更新時間：2025-09-04 (世界標準時間)。
[[["容易理解","easyToUnderstand","thumb-up"],["確實解決了我的問題","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["難以理解","hardToUnderstand","thumb-down"],["資訊或程式碼範例有誤","incorrectInformationOrSampleCode","thumb-down"],["缺少我需要的資訊/範例","missingTheInformationSamplesINeed","thumb-down"],["翻譯問題","translationIssue","thumb-down"],["其他","otherDown","thumb-down"]],["上次更新時間：2025-09-04 (世界標準時間)。"],[[["\u003cp\u003eCloud Profiler is a tool that continuously gathers CPU usage and memory-allocation data from production applications.\u003c/p\u003e\n"],["\u003cp\u003eCloud Profiler attributes performance data to the corresponding source code, helping identify resource-intensive areas.\u003c/p\u003e\n"],["\u003cp\u003eJava 8 runtime does not support \u003ccode\u003eGAE_PROFILER_MODE\u003c/code\u003e, requiring migration to a later version for Profiler agent use.\u003c/p\u003e\n"],["\u003cp\u003eDetailed information on profiling concepts and capturing data for supported Java runtimes is available in the Cloud Profiler documentation.\u003c/p\u003e\n"]]],[],null,["# Understand performance with Cloud Profiler\n\n| **Note:** The Java 8 runtime [doesn't support](/appengine/docs/standard/lifecycle/runtime-lifecycle#end_of_support) `GAE_PROFILER_MODE`. To continue using the Profiler agent, you must [migrate your application](/appengine/migration-center/standard/migrate-to-second-gen/java-differences) to the latest supported version of Java. To configure the Profiler agent for your second-generation Java application, see [Profiling Java applications](/profiler/docs/profiling-java#starting_your_program).\n\nCloud Profiler is a statistical, low-overhead profiler that\ncontinuously gathers CPU usage and memory-allocation information from your\nproduction applications. It attributes that information to the source code\nthat generated it, helping you identify the parts of your application that are\nconsuming the most resources, and otherwise illuminating your applications\nperformance characteristics. For a detailed overview, see\n[Profiling concepts](/profiler/docs/concepts-profiling) in the Cloud Profiler\ndocumentation.\n\nTo capture profiling data for the latest supported Java runtime, see\n[Profiling Java applications](/profiler/docs/profiling-java)."]]