Getting the parameters of a running JVM

Question

Is there a way to get the parameters of a running JVM? Is there a command line tool like jstat which takes as input the pid of the JVM and returns its starting parameters? I

Answer 1

On Linux:

java -XX:+PrintFlagsFinal -version | grep -iE 'HeapSize|PermSize|ThreadStackSize'

On Mac OSX:

java -XX:+PrintFlagsFinal -version | grep -iE 'heapsize|permsize|threadstacksize'

On Windows:

C:\>java -XX:+PrintFlagsFinal -version | findstr /i "HeapSize PermSize ThreadStackSize"

Source: https://www.mkyong.com/java/find-out-your-java-heap-memory-size/