io.prometheus.client.utility.jvmstat

Class JvmstatMonitor.GarbageCollectionInstrumentation

java.lang.Object

io.prometheus.client.utility.jvmstat.JvmstatMonitor.GarbageCollectionInstrumentation

Enclosing class:

JvmstatMonitor

public static class JvmstatMonitor.GarbageCollectionInstrumentation
extends Object

Provide visibility about the internals of the JVM's garbage collector.

Generated Metrics

jvmstat_garbage_collection_invocations_total

Since JRE 1.1, the Java Virtual Machine has used a generational model for managing memory due to object lifecycle in well-designed systems typically following an exponential distribution whereby the majority of object born die young. This means great efficiency gains can be achieved when long-standing tenured objects are ignored (i.e., collected less frequently) and the focus of collection becomes those newly-birthed objects

  o  |
  b  | X
  j  | X
  e  | X  X
  c  | X  X
  t  | X  X  X
  s  | X  X  X
     | X  X  X  X  X  X
  #   —————————————————————
       0  1  2  3  4  5 … n

      object cohort age
 

This is to say, assuming a small amount of persistent in-memory state within a server, the majority of objects are allocated during units of work (e.g., HTTP requests, RPCs, etc.) and have no bearing or produce little by way of side effects that need to be retained later in the life of the server. This is the ideal case.

Metric Dimensions

• generation: The managed memory region name.

jvmstat_garbage_collection_duration_ms_total

This metric tracks the amount of time spent spent collecting the respective generation.

Metric Dimensions

• generation: The managed memory region name.

Constructor Summary

Constructors

Constructor and Description
JvmstatMonitor.GarbageCollectionInstrumentation()

Method Summary

Methods

Modifier and Type	Method and Description
boolean	visit(String name, sun.jvmstat.monitor.Monitor monitor)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

JvmstatMonitor.GarbageCollectionInstrumentation

public JvmstatMonitor.GarbageCollectionInstrumentation()

Method Detail

visit

public boolean visit(String name,
            sun.jvmstat.monitor.Monitor monitor)