How to use jmap heap

Question

I have seen in tutorials, that with command jmap -heap<pid> , I can receive info about heap state.

Now this command is unavailable.

There are only jmap -dump:live,format:b,file=heap.bin but it save data to unreadable bin format.

How can I receive heap state info using jmap to console?

*On Windows

Upd. I found the answer: On new versions Jdk we can use command:

jhsdb jmap --heap --pid

Answer 1

If you are running on a Unix/Linux platform execute following command to generate the heap dump.

kill -3 <PID of the Java Process>

Generated heap dump file will be either in home directory of the user executed the command, or in absolute path of the jar file.

Answer 2

You can analyze the heapdump generated by jmap -dump:live,format:b,file=heap.bin with https://www.eclipse.org/mat/ . MAT is able to read the binary format.

Answer 3

I found the answer. In new JDK versions it works:

jhsdb jmap --heap --pid <pid number>