Network Deployment (Distributed operating systems), v8.0 > Reference > Administrator best practices

Thread pool counters

We 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

Name/Key	Description	Granularity	Type	Level	Overhead	ID
CreateCount threadPoolModule.threadCreates	Total number of threads created	Thread pool	CountStatistic	All	Low	1
DestroyCount threadPoolModule.threadDestroys	Total number of threads destroyed	Thread pool	CountStatistic	All	Low	2
ActiveCount threadPoolModule.activeThreads	Number of concurrently active threads. Can include a count for a long-running thread 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	Thread pool	BoundedRangeStatistic	Extended	High	3
PoolSize threadPoolModule.poolSize	Average number of threads in pool	Thread pool	BoundedRangeStatistic	Basic	High	4
PercentMaxed threadPoolModule.percentMaxed	Average percent of the time that all threads are in use	Thread pool	BoundedRangeStatistic	All	High	5
DeclaredthreadHungCount threadPoolModule.declaredThreadHung	Number of threads declared hung	Thread pool	CountStatistic	All	Max	6
ClearedThreadHangCount threadPoolModule.declaredThreadHangCleared	Number of thread hangs cleared	Thread pool	CountStatistic	All	Max	7
ConcurrentHungThreadCount threadPoolModule.concurrentlyHungThreads	Number of concurrently hung threads	Thread pool	BoundedRangeStatistic	All	Max	8
ActiveTime threadPoolModule.activeTime	Average time in milliseconds the threads are in active state	Thread pool	TimeStatistic	All	Max	9

Monitor overall system health

Related

PMI data organization

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