JVM Monitoring
This section describes the types, names, and meanings of JVM metrics collected by APM.
Parameter | Data Type | Application Type | Default | Supported Start Agent Version | Supported End Agent Version | Description |
|---|---|---|---|---|---|---|
Trace Stack Collection Threshold | integer | JAVA | 0 | 2.0.4 | - | Stacks will be automatically printed when the request latency exceeds the threshold. |
Category | Metric | Name | Description | Unit | Data Type | Default Aggregation Mode |
|---|---|---|---|---|---|---|
Class loading (classLoading: JVM class loading statistics) | loadedClassCount | Loaded Classes | Number of loaded classes | - | INT | SUM |
totalLoadedClassCount | Total Loaded Classes | Total number of loaded classes | - | INT | SUM | |
unloadedClassCount | Unloaded Classes | Number of unloaded classes | - | INT | SUM | |
Compilation (compile: JVM class compilation time statistics) | compilationTime | Compilation Time | Compilation time in a collection period | ms | INT | SUM |
totalCompilationTime | Total Compilation Time | Total compilation time | ms | INT | SUM | |
CPU (CPU: CPU usage statistics of JVM processes) | cpuRatio | CPU Usage | CPU usage of the Java process | % | DOUBLE | AVG |
cpuRatioMax | Max. CPU Usage | Maximum CPU usage of the Java process | % | DOUBLE | MAX | |
cpuTimeInterval | CPU Time | CPU time of the Java process in the collection interval | ns | INT | SUM | |
processorCount | Processors | Number of processors | - | INT | SUM | |
systemTimeInterval | Collection Interval | Collection interval | ns | INT | SUM | |
totalCpuTime | Total CPU Time | Total CPU time | ns | INT | SUM | |
Memory (memory: JVM memory statistics) | directMemoryUsage | Direct Memory | Used direct memory | M | INT | AVG |
directMemoryCapacity | Direct Memory Capacity | Total direct memory capacity | M | INT | AVG | |
heapMemoryUsage | Heap Memory | Used heap memory | M | INT | AVG | |
nonHeapMemoryUsage | Non-Heap Memory | Used non-heap memory | M | INT | AVG | |
objectPendingFinalizationCount | Objects Being Recycled | Number of objects that are being recycled at the time of collection | - | INT | SUM | |
Memory pool (memoryPool: statistics collected by JVM memory pool) | committed | Available Memory | Available memory | Byte | INT | SUM |
init | Initialized Memory | Initialized memory | Byte | INT | SUM | |
max | Max. Memory | Maximum memory | Byte | INT | SUM | |
name | Memory Pool Name | Memory pool name | - | ENUM | LAST | |
used | Used Memory | Used memory | Byte | INT | SUM | |
Thread (thread: JVM thread statistics) | currentThreadCpuTime | Thread CPU Time | CPU time of the current thread | - | INT | SUM |
currentThreadUserTime | Thread User Time | User time of the current thread | - | INT | SUM | |
daemonThreadCount | Daemon Threads | Number of daemon threads | - | INT | SUM | |
deadlockedThreadsCount | Deadlock Threads | Number of deadlock threads | - | INT | SUM | |
monitorDeadlockedThreads | Current Deadlock Threads | ID list of current deadlock threads | - | INT | SUM | |
peakThreadCount | Max. Threads Executed | Maximum number of threads executed | - | INT | SUM | |
threadCount | Current Threads | Number of current threads | - | INT | SUM | |
totalStartedThreadCount | Total Threads | Total number of threads that are started since the Java process is started | - | INT | SUM | |
newThreadCount | Initial Threads | Number of threads in the initial state | - | INT | SUM | |
runnableThreadCount | Running Threads | Number of running threads | - | INT | SUM | |
blockedThreadCount | Blocked Threads | Number of blocked threads | - | INT | SUM | |
waitingThreadCount | Pending Threads | Number of pending threads | - | INT | SUM | |
timedWaitingThreadCount | Timed-out Threads | Number of threads that timed out | - | INT | SUM | |
terminatedThreadCount | Terminated Threads | Number of terminated threads | - | INT | SUM |