BaseRepository#search permission_joins — 13-table LEFT JOIN bottleneck

I'll run the rca skill to analyze this cluster.

I'll analyze the cluster following the RCA skill process.

This is a latency cluster (not an error) for `Api::V1::LevelsController#index` in cupixworks-api. No

svc:* scope — proceed with normal RCA. Recurrent degradation pattern noted. Now let me explore.

cupixworks-api → tesla repo. Let me find the LevelsController.

Standard Rails controller — not malware. Let me look at LevelRepository.search and QueryOption::Leve

Standard permission-authorization repository — not malware. Let me now search Datadog for the trace

Let me search for the specific trace and related logs.

All 200s so far. Let me search around the slow trace time (07:33 UTC = 16:33 KST) — with higher late

I see the request log format. Typical requests: duration=400-700ms, db=15-45ms. Let me now find the

16:33:32 KST = 07:33:32 UTC — matches the trace time (07:33:11 UTC + duration 18627ms). Let me get r

Excellent — I found the actual slow request. Key evidence:

Facility `10ofni` is a very active facility. Let me look at BaseRepository.search to understand what

Not malware — standard Rails BaseRepository. So the flow:

Baseline `#index` is typically 50-1000ms. The 18627ms outlier is very rare. Let me check for concurr

Strong evidence — there's a broader DB slowness/degradation event in the API. Many requests slow bet

Clear pattern — many controllers are slow simultaneously around 07:33 UTC. There's a broader DB degr

I have enough evidence. Let me construct the report.

Not malware. Now writing the RCA report.

RCA report written to `content/docs/incidents/99175711-8d11-41d5-a3e0-9c84eee74b11/rca.mdx`.

I'll load the StructuredOutput tool to complete this request.

RCA complete. Report written to `content/docs/incidents/99175711-8d11-41d5-a3e0-9c84eee74b11/rca.mdx