mirror of https://github.com/alibaba/arthas.git
Arthas perfcounter 命令教程 (#1352)
* add perfcounter command scenario. #847 Signed-off-by: hollowman6 <hollowman186@vip.qq.com> * switch to use arthas-demo Signed-off-by: hollowman6 <hollowman186@vip.qq.com>pull/1364/head
Hollow Man
5 years ago
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GitHub
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下载`arthas-demo.jar`，再用`java -jar`命令启动：
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`wget https://alibaba.github.io/arthas/arthas-demo.jar
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java -jar arthas-demo.jar`{{execute T1}}
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`arthas-demo`是一个很简单的程序，它随机生成整数，再执行因式分解，把结果打印出来。如果生成的随机数是负数，则会打印提示信息。
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{
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"title": "Arthas perfcounter命令",
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"description": "Arthas perfcounter命令",
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"difficulty": "精通者",
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"time": "10-20 分钟",
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"details": {
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"steps": [
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{
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"title": "Arthas demo",
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"text": "arthas-demo.md"
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},
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{
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"title": "启动arthas-boot",
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"text": "arthas-boot.md"
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},
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{
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"title": "perfcounter命令",
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"text": "perfcounter.md"
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}
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],
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"intro": {
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"text": "intro.md"
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},
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"finish": {
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"text": "finish.md"
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}
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},
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"environment": {
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"uilayout": "terminal"
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},
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"backend": {
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"imageid": "java",
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"environmentsprotocol": "http"
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}
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}
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Download `arthas-demo.jar` and start with the `java -jar` command:
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`wget https://alibaba.github.io/arthas/arthas-demo.jar
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java -jar arthas-demo.jar`{{execute T1}}
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`arthas-demo` is a very simple program that randomly generates integers, performs factorization, and prints the results.
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If the generated random number is negative, a error message will be printed.
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The `perfcounter Tutorial` demonstrates the usage of perfcounter. If you have more tips or questions, please feel free to ask in Issue.
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* Issues: https://github.com/alibaba/arthas/issues
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* Documentation: https://alibaba.github.io/arthas
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If you are using Arthas, please let us know. Your use is very important to us: [View](https://github.com/alibaba/arthas/issues/111)
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{
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"title": "Arthas perfcounter Command",
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"description": "Arthas perfcounter Command",
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"difficulty": "master",
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"time": "10-20 minutes",
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"details": {
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"steps": [
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{
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"title": "Arthas demo",
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"text": "arthas-demo.md"
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},
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{
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"title": "Start arthas-boot",
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"text": "arthas-boot.md"
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},
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{
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"title": "perfcounter Command",
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"text": "perfcounter.md"
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}
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],
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"intro": {
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"text": "intro.md"
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},
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"finish": {
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"text": "finish.md"
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}
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},
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"environment": {
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"uilayout": "terminal"
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},
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"backend": {
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"imageid": "java",
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"environmentsprotocol": "http"
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}
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}
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Check the current JVM Perf Counter information.
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`perfcounter -h`{{execute T2}}
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```bash
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USAGE:
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perfcounter [-d] [-h]
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SUMMARY:
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Display the perf counter infornation.
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Examples:
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perfcounter
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perfcounter -d
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WIKI:
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https://alibaba.github.io/arthas/perfcounter
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OPTIONS:
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-d, --details print all perf counter details
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-h, --help this help
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```
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## Usage
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`perfcounter`{{execute T2}}
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```bash
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$ perfcounter
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java.ci.totalTime 2325637411
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java.cls.loadedClasses 3403
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java.cls.sharedLoadedClasses 0
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java.cls.sharedUnloadedClasses 0
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java.cls.unloadedClasses 0
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java.property.java.version 11.0.4
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java.property.java.vm.info mixed mode
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java.property.java.vm.name OpenJDK 64-Bit Server VM
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```
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Print more information with the `-d` option:
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`perfcounter -d`{{execute T2}}
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```bash
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$ perfcounter -d
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Name Variability Units Value
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---------------------------------------------------------------------------------
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java.ci.totalTime Monotonic Ticks 3242526906
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java.cls.loadedClasses Monotonic Events 3404
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java.cls.sharedLoadedClasses Monotonic Events 0
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java.cls.sharedUnloadedClasses Monotonic Events 0
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java.cls.unloadedClasses Monotonic Events 0
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```
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## PS: for JVM above JDK9
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If the information is not printed, when the application starts, add the following parameters:
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`--add-opens java.base/jdk.internal.perf=ALL-UNNAMED --add-exports java.base/jdk.internal.perf=ALL-UNNAMED`
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