names of MemoryManagerMXBean and MemoryPoolMXBean instances in HotSpot JVM

memoryPoolsHotSpot

Table of names of MemoryManagerMXBean and MemoryPoolMXBean instances under
different GC algorithms in Oracle HotSpot VM. Memory managers list the pools
they manage in square brackets; memory pools show their maximum sizes for -Xmx200M setting.

$ java -version
java version "1.6.0_24"
Java(TM) SE Runtime Environment (build 1.6.0_24-b07)
Java HotSpot(TM) 64-Bit Server VM (build 19.1-b02, mixed mode)

SerialGC:
---------
Memory managers:
  CodeCacheManager [Code Cache]
  Copy [Eden Space, Survivor Space]
  MarkSweepCompact [Eden Space, Survivor Space, Tenured Gen, Perm Gen]
Memory Pools:
  Code Cache 48
  Eden Space 53
  Survivor Space 6
  Tenured Gen 133
  Perm Gen 82

ParallelGC:
-----------
Memory managers:
  CodeCacheManager [Code Cache]
  PS Scavenge [PS Eden Space, PS Survivor Space]
  PS MarkSweep [PS Eden Space, PS Survivor Space, PS Old Gen, PS Perm Gen]
Memory Pools:
  Code Cache 48
  PS Eden Space 56
  PS Survivor Space 5
  PS Old Gen 133
  PS Perm Gen 82

ParallelOldGC:
---------------
Memory managers:
  CodeCacheManager [Code Cache]
  PS Scavenge [PS Eden Space, PS Survivor Space]
  PS MarkSweep [PS Eden Space, PS Survivor Space, PS Old Gen, PS Perm Gen]
Memory Pools:
  Code Cache 48
  PS Eden Space 56
  PS Survivor Space 5
  PS Old Gen 133
  PS Perm Gen 82

ConcMarkSweepGC:
----------------
Memory managers:
  CodeCacheManager [Code Cache]
  ParNew [Par Eden Space, Par Survivor Space]
  ConcurrentMarkSweep [Par Eden Space, Par Survivor Space, CMS Old Gen, CMS Perm Gen]
Memory Pools:
  Code Cache 48
  Par Eden Space 20
  Par Survivor Space 2
  CMS Old Gen 175
  CMS Perm Gen 82

G1GC:
-----
Memory managers:
  CodeCacheManager [Code Cache]
  G1 Young Generation [G1 Eden, G1 Survivor]
  G1 Old Generation [G1 Eden, G1 Survivor, G1 Old Gen, G1 Perm Gen]
Memory Pools:
  Code Cache 48
  G1 Eden 0
  G1 Survivor 0
  G1 Old Gen 0
  G1 Perm Gen 82

An interesting observation is that with G1GC, all heap pools report max size of 0…

What JVM version did you test for G1GC pools? I've seen some fixes around this area fairly recently.

1.6.0_24; I added the output from java -version to the gist now.

Great, thanks. I think this may be fixed in Java 7 update 2 (released today), but not sure.

Very useful, thanks! How is this with Java 8? Could you possibly share the code that generates this overview?

Code for generating this or an update would be nice. As it is this is pretty useful, tx for posting it.