jmap -heap 报错

使用jmap看某个id的内存情况时报错，报错信息如下

[root@zkper-sso-01 logs]# jmap -heap 4467
Attaching to process ID 4467, please wait...
Exception in thread "main" java.lang.reflect.InvocationTargetException
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at sun.tools.jmap.JMap.runTool(JMap.java:197)
	at sun.tools.jmap.JMap.main(JMap.java:128)
Caused by: sun.jvm.hotspot.runtime.VMVersionMismatchException: Supported versions are 24.121-b00. Target VM is 24.60-b09
	at sun.jvm.hotspot.runtime.VM.checkVMVersion(VM.java:234)
	at sun.jvm.hotspot.runtime.VM.<init>(VM.java:297)
	at sun.jvm.hotspot.runtime.VM.initialize(VM.java:368)
	at sun.jvm.hotspot.bugspot.BugSpotAgent.setupVM(BugSpotAgent.java:598)
	at sun.jvm.hotspot.bugspot.BugSpotAgent.go(BugSpotAgent.java:493)
	at sun.jvm.hotspot.bugspot.BugSpotAgent.attach(BugSpotAgent.java:331)
	at sun.jvm.hotspot.tools.Tool.start(Tool.java:163)
	at sun.jvm.hotspot.tools.HeapSummary.main(HeapSummary.java:40)
	... 6 more

 原因可能是机器上有多个jdk，所以出现版本不一致的情况

正确的使用 方式是：增加jdk路径

[root@zkper-sso-01 logs]# /data/jdk1.7.0_60/bin/jmap -heap 4467
Attaching to process ID 4467, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 24.60-b09

using thread-local object allocation.
Parallel GC with 4 thread(s) //gc线程数

Heap Configuration:
   MinHeapFreeRatio = 0
   MaxHeapFreeRatio = 100
   MaxHeapSize      = 2147483648 (2048.0MB) //最大堆内存
   NewSize          = 1310720 (1.25MB) //新生代
   MaxNewSize       = 17592186044415 MB //最大新生代内存
   OldSize          = 5439488 (5.1875MB) //老年区
   NewRatio         = 2 //新生代与老年代比例
   SurvivorRatio    = 8 //eden与survivor的比例
   PermSize         = 21757952 (20.75MB)//永久区
   MaxPermSize      = 85983232 (82.0MB) //永久区最大内存
   G1HeapRegionSize = 0 (0.0MB)

Heap Usage:
PS Young Generation
Eden Space:
   capacity = 154664960 (147.5MB)
   used     = 15303264 (14.594329833984375MB)
   free     = 139361696 (132.90567016601562MB)
   9.894460904396187% used
From Space:
   capacity = 12582912 (12.0MB)
   used     = 655360 (0.625MB)
   free     = 11927552 (11.375MB)
   5.208333333333333% used
To Space:
   capacity = 12058624 (11.5MB)
   used     = 0 (0.0MB)
   free     = 12058624 (11.5MB)
   0.0% used
PS Old Generation
   capacity = 358088704 (341.5MB)
   used     = 25058544 (23.897689819335938MB)
   free     = 333030160 (317.60231018066406MB)
   6.997859390727947% used
PS Perm Generation
   capacity = 22020096 (21.0MB)
   used     = 9592704 (9.1483154296875MB)
   free     = 12427392 (11.8516845703125MB)
   43.563406808035715% used

3796 interned Strings occupying 309472 bytes.