java top命令_JvmTop监控JVM的TOP命令

JvmTop.java - jvmtop是一款类似Linux下TOP的Java监控命令，可以时刻查询JVM内部线程运行情况，和Jstack一起配合使用，能够发现导致系统负载增大的一些原因。

jvmtop.sh -h 可以获得帮助.

jvmtop.sh JVM的PID 能够获得这个JVM内部的线程情况。

JVM的PID可以通过PS命令获得。

举例监控sh命令：

#!/bin/sh

PID=`ps aux | sort -rnk 3 | awk '{print $2}' |head -n 1`

/home/jdon/jvmtop.sh -n3 $PID >>out.txt

如果JVM成为最忙碌的，打印出该JVM内部线程，遍历三次，如下：

PID 24188: com.jvmtop.JvmTop

ARGS: 1801

VMARGS:

VM: Sun Microsystems Inc. Java HotSpot(TM) Client VM 1.6.0_31

UP: 0: 3m #THR: 12 #THRPEAK: 12 #THRCREATED: 12 USER: root

GC-Time: 0: 0m #GC-Runs: 67 #TotalLoadedClasses: 1475

CPU: 2.78% GC: 0.00% HEAP: 5m / 245m NONHEAP: 18m / 118m

TID NAME STATE CPU TOTALCPU BLOCKEDBY

14 RMI TCP Connection(1)-10.241.8 RUNNABLE 0.93% 0.77%

1 main TIMED_WAITING 0.93% 86.63%

15 JMX server connection timeout TIMED_WAITING 0.00% 0.00%

13 RMI TCP Accept-0 RUNNABLE 0.00% 0.00%

12 Attach Listener RUNNABLE 0.00% 0.51%

11 Thread-1 TIMED_WAITING 0.00% 0.00%

10 RMI Scheduler(0) TIMED_WAITING 0.00% 0.00%

9 GC Daemon TIMED_WAITING 0.00% 0.00%

8 RMI RenewClean-[110.76.43.83:3 TIMED_WAITING 0.00% 0.00%

4 Signal Dispatcher RUNNABLE 0.00% 0.00%

Note: Only top 10 threads (according cpu load) are shown!