[admin@cfsslave-acf322bf gatling_stt]$ /export/servers/jdk11.0.2/bin/jhsdb jmap --heap --pid 85542 
Attaching to process ID 85542, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 11.0.2+9

using thread-local object allocation.
Garbage-First (G1) GC with 10 thread(s)

Heap Configuration:
   MinHeapFreeRatio         = 40
   MaxHeapFreeRatio         = 70
   MaxHeapSize              = 4294967296 (4096.0MB)
   NewSize                  = 1363144 (1.2999954223632812MB)
   MaxNewSize               = 2575302656 (2456.0MB)
   OldSize                  = 5452592 (5.1999969482421875MB)
   NewRatio                 = 2
   SurvivorRatio            = 8
   MetaspaceSize            = 21807104 (20.796875MB)
   CompressedClassSpaceSize = 1073741824 (1024.0MB)
   MaxMetaspaceSize         = 17592186044415 MB
   G1HeapRegionSize         = 8388608 (8.0MB)

Heap Usage:
G1 Heap:
   regions  = 512
   capacity = 4294967296 (4096.0MB)
   used     = 2872077680 (2739.0267181396484MB)
   free     = 1422889616 (1356.9732818603516MB)
   66.87076948583126% used
G1 Young Generation:
Eden Space:
   regions  = 184
   capacity = 2290089984 (2184.0MB)
   used     = 1543503872 (1472.0MB)
   free     = 746586112 (712.0MB)
   67.3992673992674% used
Survivor Space:
   regions  = 4
   capacity = 33554432 (32.0MB)
   used     = 33554432 (32.0MB)
   free     = 0 (0.0MB)
   100.0% used
G1 Old Generation:
   regions  = 155
   capacity = 1971322880 (1880.0MB)
   used     = 1295019376 (1235.0267181396484MB)
   free     = 676303504 (644.9732818603516MB)
   65.692910539343% used