{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://www.squid-cache.org/schemas/cache-stats",
  "title": "Squid Cache Statistics",
  "description": "Schema representing Squid cache performance statistics including request counts, hit rates, and byte counters",
  "type": "object",
  "properties": {
    "squid_version": {
      "type": "string",
      "description": "Squid version string"
    },
    "start_time": {
      "type": "string",
      "format": "date-time",
      "description": "Squid process start time"
    },
    "current_time": {
      "type": "string",
      "format": "date-time",
      "description": "Current server time"
    },
    "connection_attempts": {
      "type": "integer",
      "description": "Total connection attempts since startup"
    },
    "successful_connections": {
      "type": "integer",
      "description": "Total successful connections"
    },
    "average_connection_duration": {
      "type": "number",
      "description": "Average connection duration in seconds"
    },
    "cache_hits": {
      "type": "object",
      "properties": {
        "total": {
          "type": "integer",
          "description": "Total cache hits"
        },
        "memory": {
          "type": "integer",
          "description": "Hits served from memory cache"
        },
        "disk": {
          "type": "integer",
          "description": "Hits served from disk cache"
        },
        "hit_ratio": {
          "type": "number",
          "description": "Cache hit ratio as decimal (0.0-1.0)"
        }
      }
    },
    "request_counts": {
      "type": "object",
      "properties": {
        "total": {
          "type": "integer"
        },
        "http": {
          "type": "integer"
        },
        "https": {
          "type": "integer"
        },
        "ftp": {
          "type": "integer"
        }
      }
    },
    "byte_counts": {
      "type": "object",
      "properties": {
        "bytes_from_clients": {
          "type": "integer",
          "description": "Total bytes received from clients"
        },
        "bytes_to_clients": {
          "type": "integer",
          "description": "Total bytes sent to clients"
        },
        "bytes_from_servers": {
          "type": "integer",
          "description": "Total bytes received from origin servers"
        },
        "bytes_to_servers": {
          "type": "integer",
          "description": "Total bytes sent to origin servers"
        }
      }
    },
    "memory_usage": {
      "type": "object",
      "properties": {
        "total_accounted": {
          "type": "integer",
          "description": "Total accounted memory in bytes"
        },
        "max_resident": {
          "type": "integer",
          "description": "Maximum resident set size in bytes"
        },
        "current_resident": {
          "type": "integer",
          "description": "Current resident set size in bytes"
        }
      }
    },
    "store_directory": {
      "type": "object",
      "properties": {
        "directory": {
          "type": "string",
          "description": "Path to cache store directory"
        },
        "current_objects": {
          "type": "integer",
          "description": "Number of objects currently in the store"
        },
        "current_capacity": {
          "type": "number",
          "description": "Percentage of cache capacity used"
        }
      }
    }
  }
}