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20 lines
646 B
Markdown
20 lines
646 B
Markdown
Check the current JVM Perf Counter information.
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`perfcounter -h`{{execute T2}}
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[perfcounter command Docs](https://arthas.aliyun.com/en/doc/perfcounter.html)
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## Usage
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`perfcounter`{{execute T2}}
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Print more information with the `-d`{{}} option:
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`perfcounter -d`{{execute T2}}
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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 --add-opens java.management/sun.management.counter.perf=ALL-UNNAMED --add-opens java.management/sun.management.counter=ALL-UNNAMED`{{}}
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