Used without arguments or with the -l option, jcmd prints the list of running Java processes with their process ID, their main class and their command-line arguments. When a process ID is specified on the command line, jcmd sends the diagnostic command request to the process with this ID. When a main class is specified on the command line, jcmd sends the diagnostic command request to all Java processes for which the command-line argument is a substring of the Java process' main class. With the PerfCounter.print argument, jcmd prints the performance counters available on the targeted Java processes. With the -f option, jcmd sends to the targeted Java processes the diagnostic commands stored in the specified file.
Example usage: jcmd -l 4896 jdk.nashorn.tools.Shell 8102 sun.tools.jcmd.JCmd -l 23610 com.sun.enterprise.glassfish.bootstrap.ASMain --domain domain1 --domaindir /d/glassfish-3.1.2.2/glassfish/domains/domain1
-h Prints a help message. -helpPrints a help message. To find out what kind of…
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