Edge metrics

The Observability API allows you to programmatically define custom dashboards to view in the Observability web interface. These metrics are compatible with dashboard items where data_source.type is stats.edge.

Edge metrics

`all_edge_hit_requests`	integer	Number of requests sent by end users to Fastly that resulted in a hit at the edge.
`all_edge_miss_requests`	integer	Number of requests sent by end users to Fastly that resulted in a miss at the edge.
`all_error_requests`	number	Number of cache errors.
`all_hit_requests`	number	Number of cache hits.
`all_miss_requests`	number	Number of cache misses.
`all_pass_requests`	integer	Number of requests that passed through the CDN without being cached.
`all_status_1xx`	integer	Number of 'Informational' category status codes delivered.
`all_status_2xx`	integer	Number of 'Success' status codes delivered.
`all_status_3xx`	integer	Number of 'Redirection' codes delivered.
`all_status_4xx`	integer	Number of 'Client Error' codes delivered.
`all_status_4xx_rate`	number	Percentage of responses with 4xx codes delivered. If there are no responses, this value will be 0%.
`all_status_5xx`	integer	Number of 'Server Error' codes delivered.
`all_status_5xx_rate`	number	Percentage of responses with 5xx codes delivered. If there are no responses, this value will be 0%.
`all_status_gte_400_rate`	number	Percentage of responses with 4xx or 5xx codes delivered. If there are no responses, this value will be 0%.
`all_status_lt_500_rate`	number	Percentage of responses with non-5xx codes delivered. If there are no responses, this value will be 0%.
`all_synth_requests`	integer	Number of requests that returned a synthetic response (i.e., response objects created with the synthetic VCL statement).
`attack_blocked_req_body_bytes`	integer	Body bytes received from requests that triggered a WAF rule that was blocked.
`attack_blocked_req_header_bytes`	integer	Header bytes received from requests that triggered a WAF rule that was blocked.
`attack_logged_req_body_bytes`	integer	Body bytes received from requests that triggered a WAF rule that was logged.
`attack_logged_req_header_bytes`	integer	Header bytes received from requests that triggered a WAF rule that was logged.
`attack_passed_req_body_bytes`	integer	Body bytes received from requests that triggered a WAF rule that was passed.
`attack_passed_req_header_bytes`	integer	Header bytes received from requests that triggered a WAF rule that was passed.
`attack_req_body_bytes`	integer	Body bytes received from requests that triggered a WAF rule.
`attack_req_header_bytes`	integer	Header bytes received from requests that triggered a WAF rule.
`attack_resp_synth_bytes`	integer	Bytes delivered for requests that triggered a WAF rule and returned a synthetic response.
`bandwidth`	integer	Bytes delivered (resp_header_bytes + resp_body_bytes + bereq_header_bytes + bereq_body_bytes).
`bereq_body_bytes`	integer	Body bytes sent to origin.
`bereq_header_bytes`	integer	Header bytes sent to origin.
`body_size`	integer	Body bytes delivered (alias for resp_body_bytes).
`cache_coverage`	number	How much of your site you are caching with Fastly. It is defined as the ratio of cacheable requests to total requests.
`cache_hit_ratio`	number	Deprecated. Ratio of requests served from Fastly. (hits / (hits + edge miss requests - shield hit requests).
`compute_bandwidth`	integer	Total bytes sent to customers and backends (origins) by Compute.
`compute_bereq_body_bytes`	integer	Total body bytes sent to backends (origins) by Compute.
`compute_bereq_errors`	integer	Number of backend request errors, including timeouts.
`compute_bereq_header_bytes`	integer	Total header bytes sent to backends (origins) by Compute.
`compute_beresp_body_bytes`	integer	Total body bytes received from backends (origins) by Compute.
`compute_beresp_header_bytes`	integer	Total header bytes received from backends (origins) by Compute.
`compute_execution_time_ms`	integer	Active CPU time used to process your requests.
`compute_globals_limit_exceeded`	number	Number of times a guest exceeded its globals limit.
`compute_guest_errors`	number	Number of times a service experienced an edge code error.
`compute_heap_limit_exceeded`	number	Number of times a guest exceeded its heap limit.
`compute_ram_used`	integer	RAM used for your site by Fastly, including a maximum indicating the highest usage within this timeframe and a static cap for usage.
`compute_req_body_bytes`	integer	Total body bytes received by Compute.
`compute_req_header_bytes`	integer	Total header bytes received by Compute.
`compute_request_time_ms`	integer	Time used to process your requests, including active CPU time.
`compute_requests`	integer	Number of compute requests processed.
`compute_resource_limit_exceeded`	number	Number of times a guest exceeded its resource limit, includes heap, stack, globals, and code execution timeout.
`compute_resp_body_bytes`	integer	Total body bytes sent from Compute to end user.
`compute_resp_header_bytes`	integer	Total header bytes sent from Compute to end user.
`compute_resp_status_1xx`	integer	Number of 'Informational' category status codes delivered by Compute.
`compute_resp_status_2xx`	integer	Number of 'Success' category status codes delivered by Compute.
`compute_resp_status_3xx`	integer	Number of 'Redirection' category status codes delivered by Compute.
`compute_resp_status_4xx`	integer	Number of 'Client Error' category status codes delivered by Compute.
`compute_resp_status_5xx`	integer	Number of 'Server Error' category status codes delivered by Compute.
`compute_runtime_errors`	number	Number of times a service experienced a guest runtime error.
`compute_stack_limit_exceeded`	number	Number of times a guest exceeded its stack limit.
`compute_vcpu_per_request`	integer	Average amount of CPU time used to process a request received by the service.
`ddos_action_blackhole`	number	The number of times the blackhole action was taken.
`ddos_action_close`	number	The number of times the close action was taken.
`ddos_action_limit_streams_connections`	number	For HTTP/2, the number of connections the limit-streams action was applied to.
`ddos_action_limit_streams_requests`	number	Number of 'Server Error' category status codes delivered by Compute.
`ddos_action_tarpit`	number	The number of times the tarpit action was taken.
`ddos_action_tarpit_accept`	number	The number of times the tarpit-accept action was taken.
`deliver_sub_count`	number	Number of executions of the 'deliver' Varnish subroutine.
`deliver_sub_time`	integer	Time spent inside the 'deliver' Varnish subroutine (in seconds).
`edge_hit_ratio`	number	Ratio of edge hits to edge misses (between 0 and 1).
`edge_hit_requests`	integer	Number of requests sent by end users to Fastly that resulted in a hit at the edge.
`edge_hit_resp_body_bytes`	integer	Body bytes delivered for edge hits.
`edge_hit_resp_header_bytes`	integer	Header bytes delivered for edge hits.
`edge_miss_requests`	integer	Number of requests sent by end users to Fastly that resulted in a miss at the edge.
`edge_miss_resp_body_bytes`	integer	Body bytes delivered for edge misses.
`edge_miss_resp_header_bytes`	integer	Header bytes delivered for edge misses.
`edge_requests`	integer	Number of requests sent by end users to Fastly.
`edge_resp_body_bytes`	integer	Body bytes delivered from Fastly to the end user.
`edge_resp_header_bytes`	integer	Header bytes delivered from Fastly to the end user.
`error_ratio`	number	4xx + 5xx / total number of requests.
`error_sub_count`	number	Number of executions of the 'error' Varnish subroutine.
`error_sub_time`	integer	Time spent inside the 'error' Varnish subroutine (in seconds).
`errors`	number	Number of cache errors.
`fanout_bereq_body_bytes`	integer	Fanout body bytes transferred from backend.
`fanout_bereq_header_bytes`	integer	Fanout header bytes transferred from backend.
`fanout_beresp_body_bytes`	integer	Fanout body bytes transferred to backend.
`fanout_beresp_header_bytes`	integer	Fanout header bytes transferred to backend.
`fanout_conn_time_ms`	integer	Total duration of Fanout connections with end users.
`fanout_recv_publishes`	integer	Number of messages received from API.
`fanout_req_body_bytes`	integer	Fanout body bytes transferred from client.
`fanout_req_header_bytes`	integer	Fanout header bytes transferred from client.
`fanout_resp_body_bytes`	integer	Fanout body bytes transferred to client.
`fanout_resp_header_bytes`	integer	Fanout header bytes transferred to client.
`fanout_send_publishes`	integer	Number of messages sent to clients.
`fetch_sub_count`	number	Number of executions of the 'fetch' Varnish subroutine.
`fetch_sub_time`	integer	Time spent inside the 'fetch' Varnish subroutine (in seconds).
`hash_sub_count`	number	Number of executions of the 'hash' Varnish subroutine.
`hash_sub_time`	integer	Time spent inside the 'hash' Varnish subroutine (in seconds).
`header_size`	integer	Header bytes delivered (alias for resp_header_bytes).
`hit_ratio`	number	Ratio of cache hits to cache misses (between 0 and 1).
`hit_resp_body_bytes`	integer	Body bytes delivered for cache hits.
`hit_sub_count`	number	Number of executions of the 'hit' Varnish subroutine.
`hit_sub_time`	integer	Time spent inside the 'hit' Varnish subroutine (in seconds).
`hits`	number	Number of cache hits.
`hits_time`	integer	Time spent processing cache hits (in seconds).
`hits_time_average`	integer	Average time spent processing cache hits (in milliseconds).
`http1`	integer	Number of requests received over HTTP/1.1.
`http2`	integer	Number of requests received over HTTP/2.
`http3`	integer	Number of requests received over HTTP/3(QUIC).
`imgopto`	integer	Number of responses that came from the Fastly Image Optimizer service.
`imgopto_resp_body_bytes`	integer	Body bytes delivered from the Fastly Image Optimizer service.
`imgopto_resp_header_bytes`	integer	Header bytes delivered from the Fastly Image Optimizer service.
`imgopto_shield`	integer	Number of responses delivered via a shield that came from the Fastly Image Optimizer service.
`imgopto_shield_resp_body_bytes`	integer	Body bytes delivered via a shield from the Fastly Image Optimizer service.
`imgopto_shield_resp_header_bytes`	integer	Header bytes delivered via a shield from the Fastly Image Optimizer service.
`imgvideo`	integer	Number of video responses that came from the Fastly Image Optimizer service.
`imgvideo_frames`	number	Number of video frames that came from the Fastly Image Optimizer service. A video frame is an individual image within a sequence of video.
`imgvideo_resp_body_bytes`	integer	Body bytes of video delivered from the Fastly Image Optimizer service.
`imgvideo_resp_header_bytes`	integer	Header bytes of video delivered from the Fastly Image Optimizer service.
`imgvideo_shield`	integer	Number of video responses delivered via a shield that came from the Fastly Image Optimizer service.
`imgvideo_shield_frames`	number	Number of video frames delivered via a shield that came from the Fastly Image Optimizer service. A video frame is an individual image within a sequence of video.
`imgvideo_shield_resp_body_bytes`	integer	Body bytes of video delivered via a shield from the Fastly Image Optimizer service.
`imgvideo_shield_resp_header_bytes`	integer	Header bytes of video delivered via a shield from the Fastly Image Optimizer service.
`ipv6`	integer	Number of requests that were received over IPv6.
`kv_store_class_a_operations`	number	The total number of class a operations for the KV store.
`kv_store_class_b_operations`	number	The total number of class b operations for the KV store.
`latency_0_to_1ms`	integer	Number of responses from origin with latency between 0 and 1 millisecond.
`latency_10000_to_60000ms`	integer	Number of responses from origin with latency between 10000 and 60000 milliseconds.
`latency_1000_to_5000ms`	integer	Number of responses from origin with latency between 1000 and 5000 milliseconds.
`latency_100_to_250ms`	integer	Number of responses from origin with latency between 100 and 250 milliseconds.
`latency_10_to_50ms`	integer	Number of responses from origin with latency between 10 and 50 milliseconds.
`latency_1_to_5ms`	integer	Number of responses from origin with latency between 1 and 5 milliseconds.
`latency_250_to_500ms`	integer	Number of responses from origin with latency between 250 and 500 milliseconds.
`latency_5000_to_10000ms`	integer	Number of responses from origin with latency between 5000 and 10000 milliseconds.
`latency_500_to_1000ms`	integer	Number of responses from origin with latency between 500 and 1000 milliseconds.
`latency_50_to_100ms`	integer	Number of responses from origin with latency between 50 and 100 milliseconds.
`latency_5_to_10ms`	integer	Number of responses from origin with latency between 5 and 10 milliseconds.
`latency_60000ms`	integer	Number of responses from origin with latency of 60,000 milliseconds and above.
`log`	number	Number of log lines sent.
`log_bytes`	integer	Log bytes sent.
`miss`	number	Number of cache misses.
`miss_resp_body_bytes`	integer	Body bytes delivered for cache misses.
`miss_sub_count`	number	Number of executions of the 'miss' Varnish subroutine.
`miss_sub_time`	integer	Time spent inside the 'miss' Varnish subroutine (in seconds).
`miss_time`	integer	Time spent processing cache misses (in seconds).
`miss_time_average`	integer	Average time spent processing cache misses (in milliseconds).
`object_size_100k`	integer	Number of objects served that were between 10KB and 100KB in size.
`object_size_100m`	integer	Number of objects served that were between 10MB and 100MB in size.
`object_size_10k`	integer	Number of objects served that were between 1KB and 10KB in size.
`object_size_10m`	integer	Number of objects served that were between 1MB and 10MB in size.
`object_size_1g`	integer	Number of objects served that were between 100MB and 1GB in size.
`object_size_1k`	integer	Number of objects served that were under 1KB in size.
`object_size_1m`	integer	Number of objects served that were between 100KB and 1MB in size.
`origin_fetch_body_bytes`	integer	Request body bytes sent to origin.
`origin_fetch_header_bytes`	integer	Request header bytes sent to origin.
`origin_fetch_resp_body_bytes`	integer	Body bytes received from origin.
`origin_fetch_resp_header_bytes`	integer	Header bytes received from origin.
`origin_fetches`	integer	Number of requests sent to origin.
`origin_latency`	integer	Average time to first byte on a cache miss.
`origin_latency_p50`	integer	Origin latency 50th percentile value.
`origin_latency_p95`	integer	Origin latency 95th percentile value.
`origin_latency_p99`	integer	Origin latency 99th percentile value.
`origin_offload`	number	Percentage of bytes delivered from the edge versus delivered from an origin.
`origin_revalidations`	integer	Number of responses received from origin with a 304 status code in response to an If-Modified-Since or If-None-Match request. Under regular scenarios, a revalidation will imply a cache hit. However, if using Fastly Image Optimizer or segmented caching, this may result in a cache miss.
`otfp`	integer	Number of responses that came from the Fastly On-the-Fly Packager for On Demand Streaming service for video-on-demand.
`otfp_deliver_time`	integer	Time spent delivering a response from the Fastly On-the-Fly Packager for On Demand Streaming service for video-on-demand (in seconds).
`otfp_manifests`	integer	Number of responses that were manifest files from the Fastly On-the-Fly Packager for On Demand Streaming service for video-on-demand.
`otfp_resp_body_bytes`	integer	Body bytes delivered from the Fastly On-the-Fly Packager for On Demand Streaming service for video-on-demand.
`otfp_resp_header_bytes`	integer	Header bytes delivered from the Fastly On-the-Fly Packager for On Demand Streaming service for video-on-demand.
`otfp_shield_resp_body_bytes`	integer	Body bytes delivered via a shield for the Fastly On-the-Fly Packager for On Demand Streaming service for video-on-demand.
`otfp_shield_resp_header_bytes`	integer	Header bytes delivered via a shield for the Fastly On-the-Fly Packager for On Demand Streaming service for video-on-demand.
`otfp_shield_time`	integer	Time spent delivering a response via a shield from the Fastly On-the-Fly Packager for On Demand Streaming service for video-on-demand (in seconds).
`pass`	integer	Number of requests that passed through the CDN without being cached.
`pass_resp_body_bytes`	integer	Body bytes delivered for cache passes.
`pass_sub_count`	number	Number of executions of the 'pass' Varnish subroutine.
`pass_sub_time`	integer	Time spent inside the 'pass' Varnish subroutine (in seconds).
`pass_time`	integer	Time spent processing cache passes (in seconds).
`pci`	integer	Number of responses with the PCI flag turned on.
`pipe`	number	Optional. Pipe operations performed (legacy feature).
`pipe_sub_count`	number	Number of executions of the 'pipe' Varnish subroutine.
`pipe_sub_time`	integer	Time spent inside the 'pipe' Varnish subroutine (in seconds).
`predeliver_sub_count`	number	Number of executions of the 'predeliver' Varnish subroutine.
`predeliver_sub_time`	integer	Time spent inside the 'predeliver' Varnish subroutine (in seconds).
`prehash_sub_count`	number	Number of executions of the 'prehash' Varnish subroutine.
`prehash_sub_time`	integer	Time spent inside the 'prehash' Varnish subroutine (in seconds).
`recv_sub_count`	number	Number of executions of the 'recv' Varnish subroutine.
`recv_sub_time`	integer	Time spent inside the 'recv' Varnish subroutine (in seconds).
`req_body_bytes`	integer	Body bytes received.
`req_header_bytes`	integer	Header bytes received.
`requests`	integer	Number of requests processed.
`resp_body_bytes`	integer	Body bytes delivered (edge_resp_body_bytes + shield_resp_body_bytes).
`resp_header_bytes`	integer	Header bytes delivered (edge_resp_header_bytes + shield_resp_header_bytes).
`restarts`	number	Number of restarts performed.
`segblock_origin_fetches`	integer	Number of Range requests to origin for segments of resources when using segmented caching.
`segblock_shield_fetches`	integer	Number of Range requests to a shield for segments of resources when using segmented caching.
`shield`	integer	Number of requests from edge to the shield POP.
`shield_fetch_body_bytes`	integer	Request body bytes sent to a shield.
`shield_fetch_header_bytes`	integer	Request header bytes sent to a shield.
`shield_fetch_resp_body_bytes`	integer	Response body bytes sent from a shield to the edge.
`shield_fetch_resp_header_bytes`	integer	Response header bytes sent from a shield to the edge.
`shield_fetches`	integer	Number of requests made from one Fastly data center to another, as part of shielding.
`shield_hit_ratio`	number	Ratio of shield hits to shield misses (between 0 and 1).
`shield_hit_requests`	integer	Number of requests that resulted in a hit at a shield.
`shield_hit_resp_body_bytes`	integer	Body bytes delivered for shield hits.
`shield_hit_resp_header_bytes`	integer	Header bytes delivered for shield hits.
`shield_miss_requests`	integer	Number of requests that resulted in a miss at a shield.
`shield_miss_resp_body_bytes`	integer	Body bytes delivered for shield misses.
`shield_miss_resp_header_bytes`	integer	Header bytes delivered for shield misses.
`shield_resp_body_bytes`	integer	Body bytes delivered via a shield.
`shield_resp_header_bytes`	integer	Header bytes delivered via a shield.
`shield_revalidations`	integer	Number of responses received from origin with a 304 status code, in response to an If-Modified-Since or If-None-Match request to a shield. Under regular scenarios, a revalidation will imply a cache hit. However, if using segmented caching, this may result in a cache miss.
`status_1xx`	integer	Number of 'Informational' category status codes delivered.
`status_200`	integer	Number of responses sent with status code 200 (Success).
`status_204`	integer	Number of responses sent with status code 204 (No Content).
`status_206`	integer	Number of responses sent with status code 206 (Partial Content).
`status_2xx`	integer	Number of 'Success' status codes delivered.
`status_301`	integer	Number of responses sent with status code 301 (Moved Permanently).
`status_302`	integer	Number of responses sent with status code 302 (Found).
`status_304`	integer	Number of responses sent with status code 304 (Not Modified).
`status_3xx`	integer	Number of 'Redirection' codes delivered.
`status_3xx_other`	integer	Number of all 3XX errors, excluding 301s, 302s, and 304s.
`status_400`	integer	Number of responses sent with status code 400 (Bad Request).
`status_401`	integer	Number of responses sent with status code 401 (Unauthorized).
`status_403`	integer	Number of responses sent with status code 403 (Forbidden).
`status_404`	integer	Number of responses sent with status code 404 (Not Found).
`status_404_rate`	number	Percentage of responses with 404 codes delivered. If there are no responses, this value will be 0%.
`status_406`	integer	Number of responses sent with status code 406 (Not Acceptable).
`status_416`	integer	Number of responses sent with status code 416 (Range Not Satisfiable).
`status_429`	integer	Number of responses sent with status code 429 (Too Many Requests).
`status_4xx`	integer	Number of 'Client Error' codes delivered.
`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_other`	integer	Number of all 4XX errors, excluding 400s, 401s, 403, 404, 416, and 429s.
`status_4xx_rate`	number	Percentage of responses with 4xx codes delivered. If there are no responses, this value will be 0%.
`status_4xx_ratio`	number	Ratio of requests returning 4XX codes.
`status_500`	integer	Number of responses sent with status code 500 (Internal Server Error).
`status_501`	integer	Number of responses sent with status code 501 (Not Implemented).
`status_502`	integer	Number of responses sent with status code 502 (Bad Gateway).
`status_503`	integer	Number of responses sent with status code 503 (Service Unavailable).
`status_503_ratio`	number	Percentage of requests returning 503 codes.
`status_504`	integer	Number of responses sent with status code 504 (Gateway Timeout).
`status_505`	integer	Number of responses sent with status code 505 (HTTP Version Not Supported).
`status_5xx`	integer	Number of 'Server Error' codes delivered.
`status_5xx_non_503_ratio`	number	Percentage of requests returning 5XX errors, excluding 503s.
`status_5xx_other`	integer	Number of all 5XX errors, excluding 500s, 501s, 502s, 503s, 504s, and 505s.
`status_5xx_rate`	number	Percentage of responses with 5xx codes delivered. If there are no responses, this value will be 0%.
`status_gte_400_rate`	number	Percentage of responses with 4xx or 5xx codes delivered. If there are no responses, this value will be 0%.
`status_lt_500_rate`	number	Percentage of responses with non-5xx codes delivered. If there are no responses, this value will be 0%.
`synth`	integer	Number of requests that returned a synthetic response (i.e., response objects created with the synthetic VCL statement).
`tls`	integer	Number of requests that were received over TLS.
`tls_handshake_bytes`	integer	Number of bytes transferred during TLS handshake.
`tls_v10`	integer	Number of requests received over TLS 1.0.
`tls_v11`	integer	Number of requests received over TLS 1.1.
`tls_v12`	integer	Number of requests received over TLS 1.2.
`tls_v13`	integer	Number of requests received over TLS 1.3.
`uncacheable`	integer	Number of requests that were designated uncachable.
`video`	integer	Number of responses with the video segment or video manifest MIME type (i.e., application/x-mpegurl, application/vnd.apple.mpegurl, application/f4m, application/dash+xml, application/vnd.ms-sstr+xml, ideo/mp2t, audio/aac, video/f4f, video/x-flv, video/mp4, audio/mp4).
`waf_blocked`	integer	Number of requests that triggered a WAF rule and were blocked.
`waf_logged`	integer	Number of requests that triggered a WAF rule and were logged.
`waf_passed`	integer	Number of requests that triggered a WAF rule and were passed.
`websocket_bereq_body_bytes`	integer	Total message content bytes received from origin over passthrough WebSocket connections.
`websocket_bereq_header_bytes`	integer	Total header bytes sent to origin over passthrough WebSocket connections.
`websocket_beresp_body_bytes`	integer	Total message content bytes sent to origin over passthrough WebSocket connections.
`websocket_beresp_header_bytes`	integer	Total header bytes sent to origin over passthrough WebSocket connections.
`websocket_conn_time_ms`	integer	Total duration of passthrough WebSocket connections with end users.
`websocket_req_body_bytes`	integer	Total message content bytes received from end users over passthrough WebSocket connections.
`websocket_resp_body_bytes`	integer	Total message content bytes sent to end users over passthrough WebSocket connections.
`websocket_resp_header_bytes`	integer	Total header bytes sent to end users over passthrough WebSocket connections.

Network services

Security

Compute

Quick start

Building blocks

Edge metrics

Edge metrics