As the example shows, there can be several hundred lines of information displayed. To view the system properties for pid 10672, use the following command: jcmd 10672 VM.system_propertiesĪll the system properties set for this VM are displayed. To view the version of the VM for the JVM with a pid of 10672: jcmd 10672 VM.versionīoth the Hotspot and JDK versions are displayed. So information about the VM or the garbage collector (GC) can be queried and the results returned to the command prompt window. To find out what kind of information jcmd can display about a JVM, pass the pid along with help to the command. So it appears jps -l is the default option. If the -l option is added, the output is the same. Note: Since the jcmd documentation refers to the process ID as (pid) consider pid to be interchangeable with lvmid for the purposes of this OBE. The lvmid or process ID (pid), the class name or jar name, and the command line parameters are shown in the output. So the default command returns results very similar to the jps -m command. Examples of some of these options are included below. The jcmd command allows you to query various aspects of specific virtual machines. The jcmd command is new in JDK 7 and provides many of the features of jps plus some additional information as well. The required configuration and steps are covered later in this OBE. You can use jps to remotely connect to a system. To see the arguments passed to the JVM use the jps -v option.įinally, if you don't want to see all that path and class data, use the jps -q option. The command fixes the truncation issue and shows the full path to the jar file. The jps -m command displays the same information as jps -l but adds the arguments passed to the main method. ![]() On Windows, the path name for the jar file names can be truncated. For a jar file, the path to the jar file is displayed instead The jps -l command lists full package name along with the main method for that JVM. Note that the lvmid is listed along with a short name for the main method that started the JVM. But why are 5 shown? Because a JVM is created for the jps command. ![]() So based on the earlier discussion we should see 4 JVMs. To start, run the jps command with no parameters. Therefore, the process IDs may change from one screenshot to the next. Note: The screenshots used in the examples were not all taken from the same session.
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