50.1 System metrics

The following system metrics are exposed by Spring Boot:

• The total system memory in KB (mem)
• The amount of free memory in KB (mem.free)
• The number of processors (processors)
• The system uptime in milliseconds (uptime)
• The application context uptime in milliseconds (instance.uptime)
• The average system load (systemload.average)
• Heap information in KB (heap, heap.committed, heap.init, heap.used)
• Thread information (threads, thread.peak, thread.daemon)
• Class load information (classes, classes.loaded, classes.unloaded)
• Garbage collection information (gc.xxx.count, gc.xxx.time)