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Elastic Docs ›Logstash Reference [5.1] ›Monitoring APIs

Node Stats API

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Node Stats API

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This functionality is in technical preview and may be changed or removed in a future release. Elastic will work to fix any issues, but features in technical preview are not subject to the support SLA of official GA features.

The node stats API retrieves runtime stats about Logstash.

GET /_node/stats/<types>

Where <types> is optional and specifies the types of stats you want to return.

By default, all stats are returned. You can limit the info that’s returned by combining any of the following types in a comma-separated list:

jvm

Gets JVM stats, including stats about threads, memory usage, and garbage collectors.

process

Gets process stats, including stats about file descriptors, memory consumption, and CPU usage.

pipeline

Gets runtime stats about the Logstash pipeline.

JVM Stats

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The following request returns a JSON document containing JVM stats:

GET /_node/stats/jvm

Example response:

{
  "jvm": {
    "threads": {
      "count": 33,
      "peak_count": 34
    },
    "mem": {
      "heap_used_in_bytes": 276974824,
      "heap_used_percent": 13,
      "heap_committed_in_bytes": 519045120,
      "heap_max_in_bytes": 2075918336,
      "non_heap_used_in_bytes": 182122272,
      "non_heap_committed_in_bytes": 193372160,
      "pools": {
        "survivor": {
          "peak_used_in_bytes": 8912896,
          "used_in_bytes": 11182152,
          "peak_max_in_bytes": 35782656,
          "max_in_bytes": 71565312,
          "committed_in_bytes": 17825792
        },
        "old": {
          "peak_used_in_bytes": 111736080,
          "used_in_bytes": 171282544,
          "peak_max_in_bytes": 715849728,
          "max_in_bytes": 1431699456,
          "committed_in_bytes": 357957632
        },
        "young": {
          "peak_used_in_bytes": 71630848,
          "used_in_bytes": 94510128,
          "peak_max_in_bytes": 286326784,
          "max_in_bytes": 572653568,
          "committed_in_bytes": 143261696
        }
      }
    },
    "gc": {
      "collectors": {
        "old": {
          "collection_time_in_millis": 48,
          "collection_count": 2
        },
        "young": {
          "collection_time_in_millis": 316,
          "collection_count": 23
        }
      }
    }
  }

Process Stats

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The following request returns a JSON document containing process stats:

GET /_node/stats/process

Example response:

{
  "process": {
    "open_file_descriptors": 60,
    "peak_open_file_descriptors": 65,
    "max_file_descriptors": 10240,
    "mem": {
      "total_virtual_in_bytes": 5364461568
    },
    "cpu": {
      "total_in_millis": 101294404000,
      "percent": 0
    }
  }

Pipeline Stats

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The following request returns a JSON document containing pipeline stats, including:

  • the number of events that were input, filtered, or output by the pipeline
  • stats for each configured filter or output stage
  • info about config reload successes and failures (when config reload is enabled)

Detailed pipeline stats for input plugins are not currently available, but will be available in a future release. For now, the node stats API returns an empty set array for inputs ("inputs": []).

GET /_node/stats/pipeline

Example response:

{
  "pipeline": {
    "events": {
      "duration_in_millis": 7863504,
      "in": 100,
      "filtered": 100,
      "out": 100
    },
    "plugins": {
      "inputs": [],
      "filters": [
        {
          "id": "grok_20e5cb7f7c9e712ef9750edf94aefb465e3e361b-2",
          "events": {
            "duration_in_millis": 48,
            "in": 100,
            "out": 100
          },
          "matches": 100,
          "patterns_per_field": {
            "message": 1
          },
          "name": "grok"
        },
        {
          "id": "geoip_20e5cb7f7c9e712ef9750edf94aefb465e3e361b-3",
          "events": {
            "duration_in_millis": 141,
            "in": 100,
            "out": 100
          },
          "name": "geoip"
        }
      ],
      "outputs": [
        {
          "id": "20e5cb7f7c9e712ef9750edf94aefb465e3e361b-4",
          "events": {
            "in": 100,
            "out": 100
          },
          "name": "elasticsearch"
        }
      ]
    },
    "reloads": {
      "last_error": null,
      "successes": 0,
      "last_success_timestamp": null,
      "last_failure_timestamp": null,
      "failures": 0
    }
  }

See Common Options for a list of options that can be applied to all Logstash monitoring APIs.

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