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更新 初识JFR.md

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8ga 2025-03-11 16:33:14 +08:00
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初识JFR.md
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@ -154,7 +154,7 @@ Event 是多线程产生的，如果 Event 记录要保证全局有序，那么
相加就是JFR的总内存占用。
### jcmd
### 运行时通过jcmd开启/关闭
#### 开启JFR记录
eg：`jcmd <pid> JFR.start name=profile_online maxage=1d maxsize=1g`，JFR.start 后面的参数和*-XX:StartFlightRecording*一样