JVM监控工具--jstat(虚拟机状态监控)
参考：http://docs.oracle.com/javase/6/docs/technotes/tools/share/jstat.html
C:\Documents and Settings>jstat -gcutil -h2 2112 250 4 S0 S1 E O P YGC YGCT FGC FGCT GCT 0.00 0.00 13.28 0.00 18.69 0 0.000 0 0.000 0.000 0.00 0.00 13.28 0.00 18.69 0 0.000 0 0.000 0.000 S0 S1 E O P YGC YGCT FGC FGCT GCT 0.00 0.00 13.28 0.00 18.69 0 0.000 0 0.000 0.000 0.00 0.00 13.28 0.00 18.69 0 0.000 0 0.000 0.000C:\Documents and Settings>jstat -gcutil -t 2112 250 4Timestamp S0 S1 E O P YGC YGCT FGC FGCT GCT 1239.2 0.00 0.00 13.28 0.00 18.69 0 0.000 0 0.000 0.000 1239.5 0.00 0.00 13.28 0.00 18.69 0 0.000 0 0.000 0.000 1239.7 0.00 0.00 13.28 0.00 18.69 0 0.000 0 0.000 0.000 1240.0 0.00 0.00 13.28 0.00 18.69 0 0.000 0 0.000 0.000C:\Documents and Settings>jstat -gcutil 2112 250 4 S0 S1 E O P YGC YGCT FGC FGCT GCT 0.00 0.00 13.28 0.00 18.69 0 0.000 0 0.000 0.000 0.00 0.00 13.28 0.00 18.69 0 0.000 0 0.000 0.000 0.00 0.00 13.28 0.00 18.69 0 0.000 0 0.000 0.000 0.00 0.00 13.28 0.00 18.69 0 0.000 0 0.000 0.000
