Thread Pool Statistics (Sun GlassFish Enterprise Server v3 Administration Guide)

Sun GlassFish Enterprise Server v3 Administration Guide

The thread pool fits into the tree of objects as shown in Thread Pool Tree Hierarchy.

The statistics available for thread pools are shown in the following sections:

Use the following dotted name pattern for thread pool statistics:

server.thread-pool.thread-pool.statistic

The statistics available for the thread pool are shown in the following table.

Table 8–33 Thread Pool Monitoring Statistics


Statistic	Data Type	Description
`averagetimeinqueue`	BoundedRangeStatistic	Average amount of time (in milliseconds) a request waited in the queue before being processed
`averageworkcompletiontime`	BoundedRangeStatistic	Average amount of time (in milliseconds) taken to complete an assignment
`currentbusythreads`	CountStatistic	Number of busy threads
`currentnumberofthreads`	BoundedRangeStatistic	Current number of request processing threads
`numberofavailablethreads`	CountStatistic	Number of available threads
`numberofworkitemsinqueue`	BoundedRangeStatistic	Current number of work items waiting in queue
`totalworkitemsadded`	CountStatistic	Total number of work items added to the work queue as of last sampling

The statistics available for ThreadInfo in the JVM in Java SE are shown in the following table.

Table 8–34 JVM Monitoring Statistics for Java SE - Thread Info


Statistic	Data Type	Description
`blockedcount`	CountStatistic	Total number of times that the thread entered the `BLOCKED` state.
`blockedtime`	CountStatistic	Time elapsed (in milliseconds) since the thread entered the `BLOCKED` state. Returns -1 if thread contention monitoring is disabled.
`lockname`	StringStatistic	String representation of the monitor lock that the thread is blocked to enter or waiting to be notified through the `Object.wait` method.
`lockownerid`	CountStatistic	ID of the thread that holds the monitor lock of an object on which this thread is blocking.
`lockownername`	StringStatistic	Name of the thread that holds the monitor lock of the object this thread is blocking on.
`stacktrace`	StringStatistic	Stack trace associated with this thread.
`threadid`	CountStatistic	ID of the thread.
`threadname`	StringStatistic	Name of the thread.
`threadstate`	StringStatistic	State of the thread.
`waitedtime`	CountStatistic	Elapsed time (in milliseconds) that the thread has been in a `WAITING` state. Returns -1 if thread contention monitoring is disabled.
`waitedcount`	CountStatistic	Total number of times the thread was in `WAITING` or `TIMED_WAITING` states.