Thread pool counters

You can use the thread pool counters that the Performance Monitoring Infrastructure (PMI) and Tivoli® Performance Viewer (TPV) collect to monitor your thread pool activity.

Counter definitions

Table 1. Counter definitions . The following table describes thread pool counters.
Name	Key	Description	Granularity	Type	Level	Overhead	ID
CreateCount	threadPoolModule.threadCreates	The total number of threads created	Per thread pool	CountStatistic	All	Low	1
DestroyCount	threadPoolModule.threadDestroys	The total number of threads destroyed	Per thread pool	CountStatistic	All	Low	2
ActiveCount	threadPoolModule.activeThreads	The number of concurrently active threads Note: The ActiveCount value can include a count for a long-running thread that is used for asynchronous I/O. Under these circumstances, it is possible that even when there is no apparent activity on the thread pool, the ActiveCount value will never reach zero	Per thread pool	BoundedRangeStatistic	Extended	High	3
PoolSize	threadPoolModule.poolSize	The average number of threads in pool	Per thread pool	BoundedRangeStatistic	Basic	High	4
PercentUsed	threadPoolModule.percentUsed	The average percent of the pool that is in use. The value is based on the total number of configured threads in the ThreadPool and not the current pool size.	Per thread pool	BoundedRangeStatistic	All	High	10
PercentMaxed	threadPoolModule.percentMaxed	The average percent of the time that all threads are in use	Per thread pool	BoundedRangeStatistic	All	High	5
DeclaredthreadHungCount	threadPoolModule.declaredThreadHung	The number of threads declared hung	Per thread pool	CountStatistic	All	Max	6
ClearedThreadHangCount	threadPoolModule.declaredThreadHangCleared	The number of thread hangs cleared	Per thread pool	CountStatistic	All	Max	7
ConcurrentHungThreadCount	threadPoolModule.concurrentlyHungThreads	The number of concurrently hung threads	Per thread pool	BoundedRangeStatistic	All	Max	8
ActiveTime	threadPoolModule.activeTime	The average time in milliseconds the threads are in active state Note: ActiveTime will be updated when the hung threads are cleared (The threads have completed their processing).	Per thread pool	TimeStatistic	All	Max	9