Slab Zones

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/api-evangelist/nginx/refs/heads/main/json-schema/plus-http-api-nginx-slab-zone-map-schema.json",
  "title": "Slab Zones",
  "description": "Status zones that use slab allocator.\n",
  "type": "object",
  "additionalProperties": {
    "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
        }
      }
    }
  },
  "example": {
    "http_cache": {
      "pages": {
        "used": 2,
        "free": 2452
      },
      "slots": {
        "8": {
          "used": 0,
          "free": 0,
          "reqs": 0,
          "fails": 0
        },
        "16": {
          "used": 0,
          "free": 0,
          "reqs": 0,
          "fails": 0
        },
        "32": {
          "used": 1,
          "free": 126,
          "reqs": 1,
          "fails": 0
        },
        "64": {
          "used": 2,
          "free": 62,
          "reqs": 2,
          "fails": 0
        },
        "128": {
          "used": 0,
          "free": 0,
          "reqs": 0,
          "fails": 0
        }
      }
    },
    "dns-backends": {
      "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
        }
      }
    }
  }
}