Api::V1::MeasurementsController#index (avg 15203ms, max 15203ms)

I'll run the RCA skill on this cluster.

This cluster file contains a Datadog trace reference for a slow controller action - clearly not malw

I'll begin by checking the status board first, then gathering context on this latency cluster.

I'll check the status board and gather context in parallel.

svc:* scope - proceed with normal RCA. Let me explore the MeasurementsController in the tesla repo.

Standard Rails controller - not malware. Let me examine the search implementation and query options.

Standard Rails/Elasticsearch search code, not malware. Let me search Datadog logs for the trace and

Use single time value with `-f` and `-t`.

Timestamps display in local TZ (KST = UTC+9). The cluster's first_seen is 2026-07-02T01:05:07Z = 10:

Excellent — found the specific request. Trace ID 3863876165434743336 is `GET /api/v1/reviews/q1vykf/

Critical evidence found: **`db: 4463.21`** ms, `duration: 15179.07` ms, `serialization: 3601` ms, `p

Standard search config. Let me check the Renderable/serializer and how the search executes with perm

Only this one slow request in the last day+ — an isolated outlier, not a systemic latency regression

Standard code. Let me check the MeasurementSerializer to understand serialization work.

Standard serializer. Let me check the metrics around that timestamp — was there DB/host pressure?

The tag format uses underscores. Let me query directly:

Interesting: the endpoint's avg jumped to **3.56s** in one interval (the slow request skewed the ave

The endpoint's normal avg latency is ~60-120ms; the single 15s outlier plus one more elevated interv

The host was very busy processing pano/skat data during the same window — extensive `set_parameters`

Note: In `MeasurementsController` the `_search` method **also** calls `ReviewRepository.new(current_

Only the request completion log — no debug/info traces of intermediate steps. All debug details are

Only this one call from this user. Let me also verify what's happening on the host more broadly with

No host tag on trace metrics. I have enough evidence. Let me write the RCA report.

Timestamp conversion: `2026-07-02T01:05:07.548Z` → **2026-07-02 10:05 KST**.

RCA report written. Per user instruction, cluster frontmatter is NOT modified (the pipeline manages

I'll call StructuredOutput to complete the request.

RCA complete. Report at `content/docs/incidents/2d22a0ec-aaf5-4cb1-b3d8-846c34d96199/rca.mdx`, struc