Api::V1::FeedsController#index (avg 18150ms, max 18150ms)

I'll run the RCA skill on this cluster.

I'll start by reading the cluster file and invoking the RCA skill.

I acknowledge the malware notice — this file is a normal error cluster file (not malware), just an A

Repo mapping is clear: `tesla` for `Api::V1::FeedsController#index`. Let me check the status board a

Status board scope is `svc:cupixworks-api::unknown` — no active incident, but frequent recent latenc

Let me search Datadog logs and read the controller.

Acknowledged the malware notice — this is standard Rails controller code, not malware. Let me fix th

Acknowledged — this is a Rails repository class doing Elasticsearch feed search. Not malware. Let me

Times returned are in local KST (UTC+9). first_seen is 2026-07-01T07:58:27Z = 16:58:27 KST. The 16:5

Excellent — this is the key evidence. The 18.15s request has:

So only one slow feed request in 24h. Let me check the Event model and admin_team? user check.

Acknowledged — this is a normal Rails model, not malware. Let me check the events table indices and

Key finding: `index_events_on_facility_id` exists but **no composite index on `(facility_id, eventab

Let me check the past durations to compare and also look at the raw log to see if the previous reque

Excellent evidence — comparison shows the correlation between `total_entries` and DB time is drastic

Other slow requests exist but they're mutating endpoints (PUT with likely heavy background work). Th

No errors around that window — so it's not a general DB outage, it's this specific query's performan

Time conversion: `2026-07-01T07:58:27.541Z` UTC → `2026-07-01 16:58 KST`. Log at `07:58:47.600Z` = `

RCA report written. As instructed, I did NOT modify the cluster frontmatter — the pipeline manages `

RCA complete. Report at `content/docs/incidents/2b3c088f-5596-4bcf-81dc-74e4828b2148/rca.mdx`; struc