How to request JVM garbage collection (not from code) when run from Windows command-line

Question

how could I request Java garbage collection externally, starting the program from JAR (Windows BAT used)?

• From the Java code I can do it with System.gc(

Answer 1

For a purely command-line approach, you should be able to use jcmd. I believe jcmd has been part of the standard JDK install since at least Java 1.7. The command would be something like this:

jcmd  GC.run

You can get a list of available diagnostic commands that jcmd provides for a particular process like this:

jcmd  help