jinfo tool

Need to know if there is any command / way that jinfo lists all the VM options all at once.

Also, Can someone help point to the documentation that contains all the VM options.

I found the below but it does not look complete.

http://www.oracle.com/technetwork/java/javase/tech/vmoptions-jsp-140102.html

For example: The above link does not show "jinfo -flag MaxHeapSize" the -> MaxHeapSize flag.

I need the list of all the flags.

Regards,
Mohtashim

I haven't found a great link myself let alone any decent explanation of many of the flags.

Here is a better list of the flags though it is code and so lacks in explanations...
http://cr.openjdk.java.net/~gbenson/zero-10/hotspot/src/share/vm/runtime/globals.hpp.html

The jmap tool can give some useful information. Also if you haven't used visualvm check that out. It is part of the jdk and can also be downloaded if you don't have it installed.

stevesouza$ jmap -heap 641
Attaching to process ID 641, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 19.1-b02-334

using parallel threads in the new generation.
using thread-local object allocation.
Concurrent Mark-Sweep GC

Heap Configuration:
   MinHeapFreeRatio = 40
   MaxHeapFreeRatio = 70
   MaxHeapSize      = 268435456 (256.0MB)
   NewSize          = 21757952 (20.75MB)
   MaxNewSize       = 87228416 (83.1875MB)
   OldSize          = 65404928 (62.375MB)
   NewRatio         = 7
   SurvivorRatio    = 8
   PermSize         = 21757952 (20.75MB)
   MaxPermSize      = 85983232 (82.0MB)

Heap Usage:
New Generation (Eden + 1 Survivor Space):
   capacity = 19595264 (18.6875MB)
   used     = 7890240 (7.52471923828125MB)
   free     = 11705024 (11.16278076171875MB)
   40.26605612458194% used
Eden Space:
   capacity = 17432576 (16.625MB)
   used     = 7890240 (7.52471923828125MB)
   free     = 9542336 (9.10028076171875MB)
   45.261469102443606% used
From Space:
   capacity = 2162688 (2.0625MB)
   used     = 0 (0.0MB)
   free     = 2162688 (2.0625MB)
   0.0% used
To Space:
   capacity = 2162688 (2.0625MB)
   used     = 0 (0.0MB)
   free     = 2162688 (2.0625MB)
   0.0% used
concurrent mark-sweep generation:
   capacity = 17436672 (16.62890625MB)
   used     = 8924328 (8.510902404785156MB)
   free     = 8512344 (8.118003845214844MB)
   51.18137222515856% used
Perm Generation:
   capacity = 78737408 (75.08984375MB)
   used     = 47204112 (45.01734924316406MB)
   free     = 31533296 (30.072494506835938MB)
   59.951315644020184% used

Also the jps utility will show a list of the <pid> you need to pass to jmap. You can also see this list with visualvm.

It would certainly be nice if the jvm could spit out all options both explicitly set as well as ones where the defaults where used and an indication of which ones were set.