heap-summary-demo

$JAVA_HOME/bin/jmap -heap 17081
Attaching to process ID 17081, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 20.6-b01

using thread-local object allocation.
Parallel GC with 4 thread(s)

Heap Configuration:
   MinHeapFreeRatio = 40
   MaxHeapFreeRatio = 70
   MaxHeapSize      = 1367343104 (1304.0MB)
   NewSize          = 1048576 (1.0MB)
   MaxNewSize       = 4294901760 (4095.9375MB)
   OldSize          = 4194304 (4.0MB)
   NewRatio         = 2
   SurvivorRatio    = 8
   PermSize         = 16777216 (16.0MB)
   MaxPermSize      = 268435456 (256.0MB)

Heap Usage:
PS Young Generation
Eden Space:
   capacity = 341639168 (325.8125MB)
   used     = 160286464 (152.861083984375MB)
   free     = 181352704 (172.951416015625MB)
   46.91688746882793% used
From Space:
   capacity = 56885248 (54.25MB)
   used     = 0 (0.0MB)
   free     = 56885248 (54.25MB)
   0.0% used
To Space:
   capacity = 56885248 (54.25MB)
   used     = 0 (0.0MB)
   free     = 56885248 (54.25MB)
   0.0% used
PS Old Generation
   capacity = 911605760 (869.375MB)
   used     = 910143416 (867.9804000854492MB)
   free     = 1462344 (1.3945999145507812MB)
   99.83958591924649% used
PS Perm Generation
   capacity = 16777216 (16.0MB)
   used     = 5554048 (5.2967529296875MB)
   free     = 11223168 (10.7032470703125MB)
   33.104705810546875% used