JVM Monitoring

Jvm is a collector to collect JVM information. The information includes the categories, names, descriptions, units, data types, and default aggregation modes of metrics.

**Table 1** JVM monitoring metrics
Category	Metric	Name	Description	Unit	Data Type	Default Aggregation Mode
CPU (CPU: CPU usage statistics of JVM processes)	usage	CPU Usage	CPU usage of the Java process	-	DOUBLE	AVG
Memory (memory: JVM memory statistics)	isHeap	Heap Memory	Heap memory	-	ENUM	LAST
	init	Initialized Memory	Initialized memory	-	INT	AVG
	max	Max. Memory	Maximum memory	-	INT	AVG
	used	Used Memory	Used memory	-	INT	AVG
	committed	Available Memory	Available memory	-	INT	AVG
Memory pool (memoryPool: JVM memory pool statistics)	type	Memory Pool Type	Memory pool type of the instance	-	ENUM	LAST
	init	Initialized Memory	Initialized memory	-	INT	AVG
	max	Max. Memory	Maximum memory	-	INT	AVG
	used	Used Memory	Used memory	-	INT	AVG
	committed	Available Memory	Available memory	-	INT	AVG
GC (gc: GC statistics)	phrase	Phrase	Phrase	-	ENUM	LAST
	count	GC Times	Number of GC times in a collection period	-	INT	SUM
	time	GC Time	GC duration in a collection period	ms	INT	SUM
Thread (thread: JVM thread statistics)	liveCount	Current Threads	Number of current threads	-	INT	AVG
	daemonCount	Daemon Threads	Number of Daemon threads	-	INT	AVG
	peakCount	Peak Threads	Maximum number of threads executed	-	INT	AVG
	runnableStateThreadCount	Running Threads	Number of running threads	-	INT	AVG
	blockedStateThreadCount	Blocked Threads	Number of blocked threads	-	INT	AVG
	waitingStateThreadCount	Pending Threads	Number of pending threads	-	INT	AVG
	timedWaitingStateThreadCount	Timed-out Threads	Number of threads that timed out	-	INT	AVG
Class loading (class: JVM class loading statistics)	loadedClassCount	Loaded Classes	Number of loaded classes	-	INT	SUM
	totalUnloadedClassCount	Unloaded Classes	Number of unloaded classes	-	INT	SUM
	totalLoadedClassCount	Total Loaded Classes	Total number of loaded classes	-	INT	SUM