Generic JVM/System Metrics
JVM/System Metrics describes the metrics exported by Micrometer Stats Exporter for the Java Virtual Machine (JVM) and the larger system.
| Metric | Description |
|---|---|
| jvm_buffer_count_buffers | Estimated number of buffers in the pool. |
| jvm_buffer_memory_used_bytes | Estimate of the memory that the JVM is using for this buffer pool. |
| jvm_buffer_total_capacity_bytes | Estimated total capacity of the buffers in this pool. |
| jvm_classes_loaded_classes | Number of classes that are currently loaded in the JVM. |
| jvm_classes_unloaded_classes_total | Total number of classes unloaded from the time that the JVM started execution. |
| jvm_gc_live_data_size_bytes | Size of old generation memory pool after a full garbage collection (GC). |
| jvm_gc_max_data_size_bytes | Maximum size of old generation memory pool. |
| jvm_gc_memory_allocated_bytes_total | Incremented for an increase in the size of the young generation memory pool between one GC and the next. |
| jvm_gc_memory_promoted_bytes_total | Number of positive increases in the size of the old generation memory pool from before a GC to after a GC. |
| jvm_gc_pause_seconds_count | Time spent in GC pause (count). |
| jvm_gc_pause_seconds_max | Maximum time spent in GC pause. |
| jvm_gc_pause_seconds_sum | Total time spent in GC pause. |
| jvm_memory_committed_bytes | Amount of memory in bytes committed for the JVM to use. |
| jvm_memory_max_bytes | Maximum amount of memory in bytes that can be used for memory management. |
| jvm_memory_used_bytes | Amount of used memory. |
| jvm_threads_daemon_threads | Current number of live daemon threads. |
| jvm_threads_live_threads | Current number of live threads including both daemon and non-daemon threads. |
| jvm_threads_peak_threads | The peak live thread count starting from when the JVM started or peak was reset. |
| jvm_threads_states_threads | The current number of threads in each state. |
| process_cpu_usage | Recent cpu usage for the JVM process. |
| process_files_max_files | Maximum file descriptor count. |
| process_files_open_files | Open file descriptor count. |
| process_start_time_seconds | Start time of the process (from the start of the UNIX epoch.) |
| process_uptime_seconds | JVM uptime. |
| system_cpu_count | Number of processors available to the JVM. |
| system_cpu_usage | Recent CPU usage for the whole system. |
| system_load_average_1m | Sum of the number of runnable entities queued to available processors and the number of runnable entities running on the available processors averaged over a period of time. |
| log4j2_events_total | Number of log events reported for each log level (trace, debug, info, warn, and error). |
| tomcat_sessions_active_current_sessions | Number of currently active sessions. |
| tomcat_sessions_active_max_sessions | Maximum number of active sessions. |
| tomcat_sessions_alive_max_seconds | Maximum time for all active sessions. |
| tomcat_sessions_created_sessions_total | Total number of sessions created. |
| tomcat_sessions_expired_sessions_total | Total number of sessions expired. |
| tomcat_sessions_rejected_sessions_total | Total number of sessions rejected |