1,
https://visualvm.java.net/oqlhelp.html#top
http://docs.oracle.com/javase/7/docs/technotes/samples/hprof.html#HAT
http://docs.oracle.com/javase/7/docs/technotes/guides/vm/dtrace.html
http://docs.oracle.com/javase/7/docs/technotes/tools/share/jhat.html
http://docs.oracle.com/javase/7/docs/technotes/tools/share/jmap.html
2, 抓dump
1,找到Javaw.exe的PID
2,CD C:Program FilesJavajdk1.7.0_71in
3,替代下面的pid, 然后在CMD运行,会在c: emp目录下生成dump 文件。
jmap.exe -dump:format=b,file=c: empHeapDump.hprof pid
3,
http://www.blogjava.net/rosen/archive/2010/06/13/323522.html