---
title: Golang expvar metricset
description: This is the expvar metricset of the Golang module. Go can expose its variables by the expvar API. With this metricset, you can collect all the expvar-exposed...
url: https://www.elastic.co/elastic/docs-builder/docs/2472/reference/beats/metricbeat/metricbeat-metricset-golang-expvar
applies_to:
  - Elastic Stack: Generally available in 9.0+
---

# Golang expvar metricset
This is the `expvar` metricset of the Golang module. Go can expose its variables by the expvar API. With this metricset, you can collect all the expvar-exposed variables.

## Fields

For a description of each field in the metricset, see the [exported fields](https://www.elastic.co/elastic/docs-builder/docs/2472/reference/beats/metricbeat/exported-fields-golang) section.
Here is an example document generated by this metricset:
```json
{
    "@timestamp": "2017-10-12T08:05:34.853Z",
    "agent": {
        "hostname": "host.example.com",
        "name": "host.example.com"
    },
    "event": {
        "dataset": "golang.metricbeat",
        "duration": 115000,
        "module": "golang"
    },
    "golang": {
        "metricbeat": {
            "beat.cpu.system.ticks": 166690,
            "beat.cpu.system.time.ms": 166690,
            "beat.cpu.total.ticks": 292490,
            "beat.cpu.total.time.ms": 292490,
            "beat.cpu.total.value": 292490,
            "beat.cpu.user.ticks": 125800,
            "beat.cpu.user.time.ms": 125800,
            "beat.handles.limit.hard": 1048576,
            "beat.handles.limit.soft": 1048576,
            "beat.handles.open": 7,
            "beat.info.ephemeral_id": "ed780330-bb9e-4e3c-aa77-1d943026f757",
            "beat.info.uptime.ms": 87848990,
            "beat.memstats.gc_next": 52327904,
            "beat.memstats.memory_alloc": 26333672,
            "beat.memstats.memory_total": 24294102600,
            "beat.memstats.rss": 87486464,
            "cmdline": "metricbeat --httpprof :6060 -e",
            "libbeat.config.module.running": 0,
            "libbeat.config.module.starts": 0,
            "libbeat.config.module.stops": 0,
            "libbeat.config.reloads": 1,
            "libbeat.output.events.acked": 0,
            "libbeat.output.events.active": 0,
            "libbeat.output.events.batches": 0,
            "libbeat.output.events.dropped": 0,
            "libbeat.output.events.duplicates": 0,
            "libbeat.output.events.failed": 0,
            "libbeat.output.events.total": 0,
            "libbeat.output.read.bytes": 0,
            "libbeat.output.read.errors": 0,
            "libbeat.output.type": "elasticsearch",
            "libbeat.output.write.bytes": 0,
            "libbeat.output.write.errors": 0,
            "libbeat.pipeline.clients": 6,
            "libbeat.pipeline.events.active": 4119,
            "libbeat.pipeline.events.dropped": 0,
            "libbeat.pipeline.events.failed": 0,
            "libbeat.pipeline.events.filtered": 75,
            "libbeat.pipeline.events.published": 4116,
            "libbeat.pipeline.events.retry": 18561,
            "libbeat.pipeline.events.total": 4194,
            "libbeat.pipeline.queue.acked": 0,
            "memstats": {
                "Alloc": 26413208,
                "BuckHashSys": 1844227,
                "BySize": [
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                        "Frees": 0,
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            "metricbeat.system.cpu.failures": 0,
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            "metricbeat.system.filesystem.events": 76,
            "metricbeat.system.filesystem.failures": 0,
            "metricbeat.system.filesystem.success": 77,
            "metricbeat.system.fsstat.events": 76,
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            "metricbeat.system.memory.events": 448,
            "metricbeat.system.memory.failures": 0,
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            "metricbeat.system.network.events": 1792,
            "metricbeat.system.network.failures": 0,
            "metricbeat.system.network.success": 1793,
            "metricbeat.system.process.events": 457,
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            "metricbeat.system.process_summary.events": 447,
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            "metricbeat.system.uptime.events": 7,
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            "system.cpu.cores": 4,
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            "system.load.5": 0.23,
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        }
    },
    "metricset": {
        "name": "expvar"
    },
    "service": {
        "address": "127.0.0.1:6060",
        "type": "golang"
    }
}
```