Metricsedit

The Ruby agent tracks various system and application metrics. These metrics will be sent regularly to the APM Server and from there to Elasticsearch. You can adjust the interval by setting metrics_interval.

The metrics will be stored in the apm-* index and have the processor.event property set to metric.

System metricsedit

Note: Metrics from the Ruby agent are Linux only for now.

system.cpu.total.norm.pctedit

The percentage of CPU time in states other than Idle and IOWait, normalised by the number of cores.

system.memory.totaledit

The total memory of the system in bytes.

system.memory.actual.freeedit

Free memory of the system in bytes.

system.process.cpu.total.norm.pctedit

The percentage of CPU time spent by the process since the last event. This value is normalized by the number of CPU cores and it ranges from 0 to 100%.

system.process.memory.sizeedit

The total virtual memory the process has.

system.process.memory.rss.bytesedit

The Resident Set Size, the amount of memory the process occupies in main memory (RAM).

Ruby Metricsedit

ruby.gc.countedit

The number of Garbage Collection runs since the process started.

ruby.threadsedit

The number of threads belonging to the current process.

ruby.heap.slots.liveedit

Current amount of heap slots that are live.

NB: Not currently supported on JRuby.

ruby.heap.slots.freeedit

Current amount of heap slots that are free.

NB: Not currently supported on JRuby.

ruby.heap.allocations.totaledit

Current amount of allocated objects on the heap.

NB: Not currently supported on JRuby.

ruby.gc.timeedit

The total time spent in garbage collection.

NB: You need to enable Ruby’s GC Profiler for this to get reported. You can do this at any time when your application boots by calling GC::Profiler.enable.

JVM Metricsedit

The following metrics are available when using JRuby. They use the ruby java API to gather metrics via MXBean.

jvm.memory.heap.usededit

The amount of used heap memory in bytes.

jvm.memory.heap.committededit

The amount of heap memory in bytes that is committed for the Java virtual machine to use. This amount of memory is guaranteed for the Java virtual machine to use.

jvm.memory.heap.maxedit

The amount of heap memory in bytes that is committed for the Java virtual machine to use. This amount of memory is guaranteed for the Java virtual machine to use.

jvm.memory.non_heap.usededit

The amount of used non-heap memory in bytes.

jvm.memory.non_heap.committededit

The amount of non-heap memory in bytes that is committed for the Java virtual machine to use. This amount of memory is guaranteed for the Java virtual machine to use.

jvm.memory.non_heap.maxedit

The maximum amount of non-heap memory in bytes that can be used for memory management. If the maximum memory size is undefined, the value is -1.

jvm.memory.heap.pool.usededit

The amount of used memory in bytes of the memory pool.

jvm.memory.heap.pool.committededit

The amount of memory in bytes that is committed for the memory pool. This amount of memory is guaranteed for this specific pool.

jvm.memory.heap.pool.maxedit

The maximum amount of memory in bytes that can be used for the memory pool.