JVM monitoring

NetXMS has a Java plugin that allows to monitor the JVM. This subagent is build using JMX functionality.

Metrics

Single-value Metrics

Metric	Type	Meaning
JMX.ObjectAttribute(name,object,attribute,[item])	String	Get attribute of any connection, object. Optional attribute item is used when attribute is a list.
JMX.Memory.ObjectsPendingFinalization(name)	Unsigned integer	JVM objects pending finalization
JMX.Memory.Heap.Committed(name)	Unsigned integer 64	JVM committed heap memory
JMX.Memory.Heap.Current(name)	Unsigned integer 64	JVM current heap size
JMX.Memory.Heap.Init(name)	Unsigned integer 64	JVM initial heap size
JMX.Memory.Heap.Max(name)	Unsigned integer 64	JVM maximum heap size
JMX.Memory.NonHeap.Committed(name)	Unsigned integer 64	JVM committed non-heap memory
JMX.Memory.NonHeap.Current(name)	Unsigned integer 64	JVM current non-heap memory size
JMX.Memory.NonHeap.Init(name)	Unsigned integer 64	JVM initial non-heap memory size
JMX.Memory.NonHeap.Max(name)	Unsigned integer 64	JVM maximum non-heap memory size
JMX.Threads.Count(name)	Unsigned integer	JVM live threads count
JMX.Threads.DaemonCount(name)	Unsigned integer	JVM daemon threads count
JMX.Threads.PeakCount(name)	Unsigned integer	JVM peak number of threads
JMX.Threads.TotalStarted(name)	Unsigned integer	JVM total threads started
JMX.VM.BootClassPath(name)	String	JVM boot class path
JMX.VM.ClassPath(name)	String	JVM class path
JMX.VM.LoadedClassCount(name)	Unsigned integer	JVM loaded class count
JMX.VM.Name(name)	String	JVM name
JMX.VM.SpecVersion(name)	String	JVM specification version
JMX.VM.TotalLoadedClassCount(name)	Unsigned integer	JVM total loaded class count
JMX.VM.UnloadedClassCount(name)	Unsigned integer	JVM unloaded class count
JMX.VM.Uptime(name)	Unsigned integer	JVM uptime
JMX.VM.Vendor(name)	String	JVM vendor
JMX.VM.Version(name)	String	JVM version

Lists

Metric	Meaning
JMX.Domains(name)	List of JVM domains
JMX.Objects(name)	List of JVM objects
JMX.ObjectAttributes(name)	List of JVM object’s attributes

Configuration

It is required to define the java subagent and its configuration before JMX plugin configuration. More information about the Java subagent and its configuration can be found in the Java subagent section. JMS has only one configuration parameter “Server”. It is used to define the JMX server connection string.

JMS server connection string declaration options:

• name:url

• name:login@url

• name:login/password@url

Configuration example

In this example there are 2 JMS connections defined: name and serverName2.

MasterServers = netxms.demo
SubAgent=java.nsm

[JAVA]
jvm = /usr/lib/jvm/java-8-oracle/jre/lib/amd64/server/libjvm.so
Plugin = jmx.jar

[JMX]
Server=name:login/password@localhost
Server=serverName2:admin/pwd123@server1