Documentation Grafana Cloud Knowledge graph Advanced configuration Enable metrics collection Run times Java

Configure Java to generate Prometheus metrics

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

• Install JMX Exporter
• (Recommended) Install Micrometer Prometheus Exporter. The Micrometer exporter provides more information.

Metrics and KPIs

Alerts

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