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Configure Java to generate Prometheus metrics

Use one of the following options to configure Java to generate Prometheus metrics:

Metrics and KPIs

MetricKPI

GC Count

jvm_gc_pause_seconds_count

Rate of GC Count

rate(jvm_gc_pause_seconds_count{action=“end of major GC”}[2m])

GC Pause Time

jvm_gc_pause_seconds_sum

Rate of GC Pause Time

rate(jvm_gc_pause_seconds_sum{action=“end of major GC”}[2m])

Live Thread Count

jvm_threads_live_threads

Live thread count normalized against a threshold

jvm_threads_live_threads / 200

Alerts

KPIAlert
Rate of GC CountJvmMajorGCCountHigh
Rate of GC Pause TimeJvmMajorGCTimeHigh
Live Thread CountSaturation on jvm:live_threads

Dashboard

The JVM instance KPI dashboard includes metrics for CPU, heap memory, non-heap memory, buffer pools, threads, file descriptors, and classes loaded.

CPU

  • system_cpu_usage
  • process_cpu_usage
  • system_cpu_count
  • system_load_average_1m

Heap memory

The following heap metrics are available for Eden Space, Survivor Space, and Tenured Generation.

  • jvm_memory_used_bytes{area=“heap”}
  • jvm_memory_committed_bytes{area=“heap”}
  • jvm_memory_max_bytes{area=“heap”}

Non-heap memory

The following non-heap metrics are available for Metaspace, Compressed Class Space, and Code Cache.

  • jvm_memory_used_bytes{area=“nonheap”}
  • jvm_memory_committed_bytes{area=“nonheap”}
  • jvm_memory_max_bytes{area=“nonheap”}

Buffer pools

The following metrics are available for Direct and Mapped buffers.

  • jvm_buffer_total_capacity_bytes
  • jvm_buffer_memory_used_bytes
  • jvm_buffer_count_buffers

Threads

  • jvm_threads_live_threads
  • jvm_threads_daemon_threads
  • jvm_threads_peak_threads
  • process_threads
  • jvm_threads_states_threads

File descriptors

  • process_files_open_files
  • process_files_max_files

Classes loaded

  • jvm_classes_loaded_classes

JVM instance KPI dashboard