arthas/arthas-tutorials-en/command/perfcounter/perfcounter.md

Check the current JVM Perf Counter information.

perfcounter -h{{execute T2}}

perfcounter command Docs

Usage

perfcounter{{execute T2}}

Print more information with the -d{{}} option:

perfcounter -d{{execute T2}}

PS: for JVM above JDK9

If the information is not printed, when the application starts, add the following parameters:

--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{{}}