gc.json

{
  "metric_keys": [
    "nodejs_total_heap_size"
  ],
  "dashboard": {
    "title": "Node.js Heap Statistics",
    "description": "",
    "visuals": [
      {
        "title": "Heap",
        "description": "V8 Heap Statistics",
        "line_label": "%name% - %hostname%",
        "display": "LINE",
        "format": "size",
        "format_input": "byte",
        "draw_null_as_zero": true,
        "metrics": [
          {
            "name": "nodejs_total_heap_size",
            "fields": [
              {
                "field": "GAUGE"
              }
            ],
            "tags": [
              {
                "key": "hostname",
                "value": "*"
              }
            ]
          },
          {
            "name": "nodejs_total_heap_size_executable",
            "fields": [
              {
                "field": "GAUGE"
              }
            ],
            "tags": [
              {
                "key": "hostname",
                "value": "*"
              }
            ]
          },
          {
            "name": "nodejs_used_heap_size",
            "fields": [
              {
                "field": "GAUGE"
              }
            ],
            "tags": [
              {
                "key": "hostname",
                "value": "*"
              }
            ]
          },
          {
            "name": "nodejs_total_physical_size",
            "fields": [
              {
                "field": "GAUGE"
              }
            ],
            "tags": [
              {
                "key": "hostname",
                "value": "*"
              }
            ]
          },
          {
            "name": "nodejs_malloced_memory",
            "fields": [
              {
                "field": "GAUGE"
              }
            ],
            "tags": [
              {
                "key": "hostname",
                "value": "*"
              }
            ]
          }
        ],
        "type": "timeseries"
      },
      {
        "title": "Native Contexts",
        "description": "The number of the top-level contexts currently active. Increase of this number over time indicates a memory leak.",
        "line_label": "%name% - %hostname%",
        "display": "LINE",
        "format": "number",
        "draw_null_as_zero": true,
        "metrics": [
          {
            "name": "nodejs_number_of_native_contexts",
            "fields": [
              {
                "field": "GAUGE"
              }
            ],
            "tags": [
              {
                "key": "hostname",
                "value": "*"
              }
            ]
          }
        ],
        "type": "timeseries"
      },
      {
        "title": "Detached Contexts",
        "description": "The number of contexts that were detached and not yet garbage collected. This number being non-zero indicates a potential memory leak.",
        "line_label": "%name% - %hostname%",
        "display": "LINE",
        "format": "number",
        "draw_null_as_zero": true,
        "metrics": [
          {
            "name": "nodejs_number_of_detached_contexts",
            "fields": [
              {
                "field": "GAUGE"
              }
            ],
            "tags": [
              {
                "key": "hostname",
                "value": "*"
              }
            ]
          }
        ],
        "type": "timeseries"
      }
    ]
  }
}