Plus Http Api Nginx Slab Zone Slot Structure

{
  "$schema": "https://json-structure.org/meta/core/v0/#",
  "name": "Memory Slot",
  "type": "object",
  "members": {
    "used": {
      "description": "The current number of used memory slots.",
      "type": "int32",
      "example": 0
    },
    "free": {
      "description": "The current number of free memory slots.",
      "type": "int32",
      "example": 0
    },
    "reqs": {
      "description": "The total number of attempts to allocate memory of specified size.",
      "type": "int32",
      "example": 0
    },
    "fails": {
      "description": "The number of unsuccessful attempts to allocate memory of specified size.",
      "type": "int32",
      "example": 0
    }
  }
}