janiussyafiq opened a new pull request, #13659: URL: https://github.com/apache/apisix/pull/13659
### Description Adds Prometheus metrics for the `ai-cache` plugin (#13578, #13632, #13644), integrated in `prometheus/exporter.lua` following the existing `llm_*` metric pattern: - `apisix_ai_cache_hits_total` (with `layer="exact"|"semantic"`), `apisix_ai_cache_misses_total`, `apisix_ai_cache_bypasses_total` — counters sharing the `llm_*` label set (`route_id`, `service_id`, `consumer`, `node`, `request_type`, `request_llm_model`, `llm_model`) - `apisix_ai_cache_embedding_latency` — histogram of embedding-call latency in milliseconds (the issue sketched `_seconds`, but the exporter's latency histograms use milliseconds with `DEFAULT_BUCKETS`, so this follows the house convention) Semantics: Redis fail-open lookups count as MISS; `fail_mode: error` rejections record nothing; recording happens in `log` phase and is a silent no-op when the `prometheus` plugin is disabled. Docs: label sections added to `prometheus.md` (en + zh). #### Which issue(s) this PR fixes: Part of #13290 ### Checklist - [x] I have explained the need for this PR and the problem it solves - [x] I have explained the changes or the new features added to this PR - [x] I have added tests corresponding to this change - [x] I have updated the documentation to reflect this change - [x] I have verified that this change is backward compatible (If not, please discuss on the [APISIX mailing list](https://github.com/apache/apisix/tree/master#community) first) -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
