Java, JVM internals

Question

1. I am running Eclipse, Tomcat, a servlet based webapplication my windows 10 machine. I was wondering how many JVM instances will be created?

2. Also, When will JVM be instantiated in windows 10 on startup or on starting any java based app.

Answer 1

1. One per process. See the Processes tab of your Task Manager.

2. When starting a JVM process (typically once per app, but could be more if it forks).