NGINX · Schema

Shared memory zone with slab allocator

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Properties

Name	Type	Description
pages	object	The number of free and used memory pages.
slots	object	Status data for memory slots (8, 16, 32, 64, 128, etc.)

View JSON Schema on GitHub

JSON Schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/api-evangelist/nginx/refs/heads/main/json-schema/plus-http-api-nginx-slab-zone-schema.json",
  "title": "Shared memory zone with slab allocator",
  "description": "Shared memory zone with slab allocator\n",
  "type": "object",
  "properties": {
    "pages": {
      "type": "object",
      "description": "The number of free and used memory pages.",
      "properties": {
        "used": {
          "type": "integer",
          "description": "The current number of used memory pages.",
          "example": 0
        },
        "free": {
          "type": "integer",
          "description": "The current number of free memory pages.",
          "example": 0
        }
      },
      "example": {}
    },
    "slots": {
      "type": "object",
      "title": "Memory Slots",
      "description": "Status data for memory slots (8, 16, 32, 64, 128, etc.)",
      "additionalProperties": {
        "title": "Memory Slot",
        "type": "object",
        "properties": {
          "used": {
            "type": "integer",
            "description": "The current number of used memory slots.",
            "example": 0
          },
          "free": {
            "type": "integer",
            "description": "The current number of free memory slots.",
            "example": 0
          },
          "reqs": {
            "type": "integer",
            "description": "The total number of attempts to allocate memory of specified size.",
            "example": 0
          },
          "fails": {
            "type": "integer",
            "description": "The number of unsuccessful attempts to allocate memory of specified size.",
            "example": 0
          }
        }
      },
      "example": {}
    }
  },
  "example": {
    "pages": {
      "used": 1143,
      "free": 2928
    },
    "slots": {
      "8": {
        "used": 0,
        "free": 0,
        "reqs": 0,
        "fails": 0
      },
      "16": {
        "used": 0,
        "free": 0,
        "reqs": 0,
        "fails": 0
      },
      "32": {
        "used": 0,
        "free": 0,
        "reqs": 0,
        "fails": 0
      },
      "64": {
        "used": 1,
        "free": 63,
        "reqs": 1,
        "fails": 0
      },
      "128": {
        "used": 0,
        "free": 0,
        "reqs": 0,
        "fails": 0
      },
      "256": {
        "used": 18078,
        "free": 178,
        "reqs": 1635736,
        "fails": 0
      }
    }
  }
}

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