jconsole线程面板中的阻塞总数和等待总数(转)

阻塞总数

Blocked count is the total number of times that the thread blocked to enter or reenter a monitor. I.e. the number of times a thread has been in the java.lang.Thread.State.BLOCKED state.

等待总数

Waited count is the total number of times that the thread waited for notification. i.e. the number of times that a thread has been in the ava.lang.Thread.State.WAITING or java.lang.Thread.State.TIMED_WAITING state.

当线程试图获取一个内部的对象锁(不是java.util.concurrent库中的锁)，而锁被其它线程占有，则该线程进入阻塞状态。

当线程等待另外一个线程通知调度器的一个条件的时候，它自己进入等待状态。在调用Object.wait()或Thread.join()方法，或者等待java.util.concurrent库中的Lock或Condition时，会出现等待状况

http://blog.csdn.net/mangmang2012/article/details/7106692

http://stackoverflow.com/questions/7170235/what-does-blocked-count-and-waited-count-in-a-java-thread-mean

关于jconsole的线程监控参数blocked Count ，Waited Count

详细概念见 java.lang.management.ThreadInfo