红帽全球峰会第 3 章 启动 JDK Flight Recorder
3.1. 当 JVM 启动时启动 JDK Flight Recorder
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当 Java 进程启动时，您可以启动 JDK Flight Recorder (JFR)。您可以通过添加可选参数来修改 JFR 的行为。
流程
使用
--XX选项运行java命令。$java -XX:StartFlightRecording Demo其中 Demo 是 Java 应用的名称。
JFR 使用 Java 应用程序启动。
示例
以下命令启动一个 Java 进程(Demo)，它启动一小时的 flight 记录，该记录保存到名为 demorecording.jfr 的文件：
$ java -XX:StartFlightRecording=duration=1h,filename=demorecording.jfr Demo
其他资源
- 有关 JFR 选项的详细列表，请参阅 Java 工具参考。
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