OpenTelemetry Go Runtime Metrics

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Prerequisites

You are successfully sending OpenTelemetry metrics to Datadog.
You have installed the language integration for Go.

OpenTelemetry SDK configuration

OpenTelemetry (OTel) Go applications are instrumented manually. To enable runtime metrics, see the documentation for the runtime package.

Runtime metric mappings

The following table lists the Datadog runtime metrics that are supported by mapping OpenTelemetry runtime metrics, with “N/A” indicating that there is no OpenTelemetry counterpart.

Datadog metric	Description	OpenTelemetry counterpart
`runtime.go.num_goroutine`	Number of goroutines spawned.	`process.runtime.go.goroutines`
`runtime.go.num_cgo_call`	Number of CGO calls made.	`process.runtime.go.cgo.calls`
`runtime.go.mem_stats.lookups`	Number of pointer lookups performed by the runtime.	`process.runtime.go.mem.lookups`
`runtime.go.mem_stats.heap_alloc`	Bytes of allocated heap objects.	`process.runtime.go.mem.heap_alloc`
`runtime.go.mem_stats.heap_sys`	Bytes of heap memory obtained from the operating system.	`process.runtime.go.mem.heap_sys`
`runtime.go.mem_stats.heap_idle`	Bytes in idle (unused) spans.	`process.runtime.go.mem.heap_idle`
`runtime.go.mem_stats.heap_inuse`	Bytes in in-use spans.	`process.runtime.go.mem.heap_inuse`
`runtime.go.mem_stats.heap_released`	Bytes of physical memory returned to the operating system.	`process.runtime.go.mem.heap_released`
`runtime.go.mem_stats.heap_objects`	Number of allocated heap objects.	`process.runtime.go.mem.heap_objects`
`runtime.go.mem_stats.pause_total_ns`	Cumulative nanoseconds in garbage collection (GC).	`process.runtime.go.gc.pause_total_ns`
`runtime.go.mem_stats.num_gc`	Number of completed GC cycles.	`process.runtime.go.gc.count`
`runtime.go.num_cpu`	Number of CPUs detected by the runtime.	N/A
`runtime.go.mem_stats.alloc`	Bytes of allocated heap objects.	N/A
`runtime.go.mem_stats.total_alloc`	Cumulative bytes allocated for heap objects.	N/A
`runtime.go.mem_stats.sys`	Total bytes of memory obtained from the operating system.	N/A
`runtime.go.mem_stats.mallocs`	Cumulative count of heap objects allocated.	N/A
`runtime.go.mem_stats.frees`	Cumulative count of heap objects freed.	N/A
`runtime.go.mem_stats.stack_inuse`	Bytes in stack spans.	N/A
`runtime.go.mem_stats.stack_sys`	Bytes of stack memory obtained from the operating system.	N/A
`runtime.go.mem_stats.m_span_inuse`	Bytes of allocated mspan structures.	N/A
`runtime.go.mem_stats.m_span_sys`	Bytes of memory obtained from the operating system for mspan structures.	N/A
`runtime.go.mem_stats.m_cache_inuse`	Bytes of allocated mcache structures.	N/A
`runtime.go.mem_stats.m_cache_sys`	Bytes of memory obtained from the operating system for mcache structures.	N/A
`runtime.go.mem_stats.buck_hash_sys`	Bytes of memory in profiling bucket hash tables.	N/A
`runtime.go.mem_stats.gc_sys`	Bytes of memory in garbage collection metadata.	N/A
`runtime.go.mem_stats.other_sys`	Bytes of memory in miscellaneous off-heap.	N/A
`runtime.go.mem_stats.next_gc`	Target heap size of the next GC cycle.	N/A
`runtime.go.mem_stats.last_gc`	Last garbage collection finished, as nanoseconds since the UNIX epoch.	N/A
`runtime.go.mem_stats.num_forced_gc`	Number of GC cycles that were forced by the application calling the GC function.	N/A
`runtime.go.mem_stats.gc_cpu_fraction`	Fraction of this program’s available CPU time used by the GC since the program started.	N/A
`runtime.go.gc_stats.pause_quantiles.min`	Distribution of GC pause times: minimum values.	N/A
`runtime.go.gc_stats.pause_quantiles.25p`	Distribution of GC pause times: 25th percentile.	N/A
`runtime.go.gc_stats.pause_quantiles.50p`	Distribution of GC pause times: 50th percentile.	N/A
`runtime.go.gc_stats.pause_quantiles.75p`	Distribution of GC pause times: 75th percentile.	N/A
`runtime.go.gc_stats.pause_quantiles.max`	Distribution of GC pause times: maximum values.	N/A