---
title: Domain metrics
summary: >-
  The Observability API allows you to programmatically define custom dashboards
  to view in the Observability web interface. These metrics are compatible with
  <a
  href="https://www.fastly.com/documentation/reference/api/observability/custom-dashboards/#data-source">dashboard
  items where <code>data_source.type</code> is <code>stats.domain</code></a>.
url: >-
  https://www.fastly.com/documentation/reference/api/observability/custom-dashboards/metrics/domain
---

The Observability API allows you to programmatically define custom
dashboards to view in the Observability web interface. These metrics are
compatible with
<a href="https://www.fastly.com/documentation/reference/api/observability/custom-dashboards/#data-source">dashboard items where <code>data_source.type</code> is <code>stats.domain</code></a>.

## Data model

| Field | Type | Description |
|-------|------|-------------|
| `bandwidth` | integer | Bytes delivered from domain. |
| `bereq_body_bytes` | integer | Total body bytes sent to the origin. |
| `bereq_header_bytes` | integer | Total header bytes sent to the origin. |
| `edge_hit_ratio` | number | Ratio of cache hits to cache misses from domain (between 0 and 1). |
| `edge_hit_requests` | integer | The number of domain requests delivered from the edge. |
| `edge_miss_requests` | integer | The number of domain requests fetched from the origin. |
| `edge_requests` | integer | Number of requests from the edge to domain. |
| `edge_resp_body_bytes` | integer | Number of body bytes from domain to the edge. |
| `edge_resp_header_bytes` | integer | Number of header bytes from domain to the edge. |
| `origin_fetch_resp_body_bytes` | integer | Body bytes received from origin from domain. |
| `origin_fetch_resp_header_bytes` | integer | Header bytes received from origin from domain. |
| `origin_fetches` | integer | Number of requests sent to origin from domain. |
| `origin_offload` | number | Ratio of response bytes fetched from origin from domain (between 0 and 1). 0 means no bytes were fetched from the origin, and 1 means all bytes were fetched from the origin. |
| `origin_offload_bytes` | integer | The number of bytes offloaded to the edge. |
| `origin_status_1xx` | integer | The number of 1xx status responses received from a domain's origin. |
| `origin_status_200` | integer | The number of 200 status responses received from a domain's origin. |
| `origin_status_204` | integer | The number of 204 status responses received from a domain's origin. |
| `origin_status_206` | integer | The number of 206 status responses received from a domain's origin. |
| `origin_status_2xx` | integer | The number of 2xx status responses received from a domain's origin. |
| `origin_status_301` | integer | The number of 301 status responses received from a domain's origin. |
| `origin_status_302` | integer | The number of 302 status responses received from a domain's origin. |
| `origin_status_304` | integer | The number of 304 status responses received from a domain's origin. |
| `origin_status_3xx` | integer | The number of 3xx status responses received from a domain's origin. |
| `origin_status_400` | integer | The number of 400 status responses received from a domain's origin. |
| `origin_status_401` | integer | The number of 401 status responses received from a domain's origin. |
| `origin_status_403` | integer | The number of 403 status responses received from a domain's origin. |
| `origin_status_404` | integer | The number of 404 status responses received from a domain's origin. |
| `origin_status_416` | integer | The number of 416 status responses received from a domain's origin. |
| `origin_status_429` | integer | The number of 429 status responses received from a domain's origin. |
| `origin_status_4xx` | integer | The number of 4xx status responses received from a domain's origin. |
| `origin_status_500` | integer | The number of 500 status responses received from a domain's origin. |
| `origin_status_501` | integer | The number of 501 status responses received from a domain's origin. |
| `origin_status_502` | integer | The number of 502 status responses received from a domain's origin. |
| `origin_status_503` | integer | The number of 503 status responses received from a domain's origin. |
| `origin_status_504` | integer | The number of 504 status responses received from a domain's origin. |
| `origin_status_505` | integer | The number of 505 status responses received from a domain's origin. |
| `origin_status_5xx` | integer | The number of 5xx status responses received from a domain's origin. |
| `requests` | integer | Number of requests processed from domain. |
| `status_1xx` | integer | Number of 1xx "Informational" category status codes delivered from domain. |
| `status_200` | integer | Number of responses received with status code 200 (Success) from domain. |
| `status_204` | integer | Number of responses received with status code 204 (No Content) from domain. |
| `status_206` | integer | Number of responses received with status code 206 (Partial Content) from domain. |
| `status_2xx` | integer | Number of 2xx "Success" status codes delivered from domain. |
| `status_301` | integer | Number of responses received with status code 301 (Moved Permanently) from domain. |
| `status_302` | integer | Number of responses received with status code 302 (Found) from domain. |
| `status_304` | integer | Number of responses received with status code 304 (Not Modified) from domain. |
| `status_3xx` | integer | Number of 3xx "Redirection" codes delivered from domain. |
| `status_400` | integer | Number of responses received with status code 400 (Bad Request) from domain. |
| `status_401` | integer | Number of responses received with status code 401 (Unauthorized) from domain. |
| `status_403` | integer | Number of responses received with status code 403 (Forbidden) from domain. |
| `status_404` | integer | Number of responses received with status code 404 (Not Found) from domain. |
| `status_404_rate` | number | Percentage of responses with 404 codes delivered. If there are no responses, this value will be 0%. |
| `status_416` | integer | Number of responses received with status code 416 (Range Not Satisfiable) from domain. |
| `status_429` | integer | Number of responses received with status code 429 (Too Many Requests) from domain. |
| `status_4xx` | integer | Number of 4xx "Client Error" codes delivered from domain. |
| `status_4xx_excl_404_rate` | number | Percentage of responses with 4xx codes delivered excluding 404. If there are no responses, this value will be 0%. |
| `status_4xx_rate` | number | Percentage of responses with 4xx codes delivered from domain. If there are no responses, this value will be 0%. |
| `status_500` | integer | Number of responses received with status code 500 (Internal Server Error) from domain. |
| `status_501` | integer | Number of responses received with status code 501 (Not Implemented) from domain. |
| `status_502` | integer | Number of responses received with status code 502 (Bad Gateway) from domain. |
| `status_503` | integer | Number of responses received with status code 503 (Service Unavailable) from domain. |
| `status_504` | integer | Number of responses received with status code 504 (Gateway Timeout) from domain. |
| `status_505` | integer | Number of responses received with status code 505 (HTTP Version Not Supported) from domain. |
| `status_5xx` | integer | Number of 5xx "Server Error" codes delivered from domain. |
| `status_5xx_rate` | number | Percentage of responses with 5xx codes delivered from domain. If there are no responses, this value will be 0%. |
| `status_gte_400_rate` | number | Percentage of responses with 4xx or 5xx codes delivered from domain. If there are no responses, this value will be 0%. |
| `status_lt_500_rate` | number | Percentage of responses with non-5xx codes delivered from domain. If there are no responses, this value will be 0%. |