21. $ jcmd 1234 VM.info
1234:
#
# JRE version: Java(TM) SE Runtime Environment (9.0+119) (build 9-ea+119)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (9-ea+119, mixed mode, tiered, compressed oops, g1 gc, linux-amd64)
--------------- S U M M A R Y ------------
Command Line: LongSleep
Host: Intel(R) Core(TM) i3-2367M CPU @ 1.40GHz, 2 cores, 1G, Fedora release 23 (Twenty Three)
Time: Mon May 23 20:32:22 2016 JST elapsed time: 16 seconds (0d 0h 0m 16s)
--------------- P R O C E S S ---------------
Heap address: 0x00000000e0e00000, size: 498 MB, Compressed Oops mode: 32-bit
Narrow klass base: 0x0000000000000000, Narrow klass shift: 3
Compressed class space size: 1073741824 Address: 0x0000000100000000
: