Puma — worker thread pool saturation causing request queuing
Service
cupixworks-api
Occurrences
93
Status
Reported
Confidence
85%
Actionability
44%
Cluster ID
d45d5d31-dcaf-4ed7-90e8-ad669ee707ee
First Seen
2026-05-26 12:24 UTC
Last Seen
2026-08-05 04:29 UTC
Datadog
SlackActions
Puma — worker thread pool saturation causing request queuing
What Happened#
2026-05-26 12:24:13 UTC에 cupixworks-api 서비스의 Api::V1::Admin::EditingEntitiesController#index 엔드포인트에서 1034ms의 응답 지연이 발생했다. DB 쿼리 시간은 6.48ms에 불과했으며, 전체 1034ms 중 약 1024ms가 애플리케이션 레이어에서 설명되지 않는 대기 시간으로 확인되었다.
Quick Facts#
| Field | Value |
|---|---|
| resource_name | Api::V1::Admin::EditingEntitiesController#index |
| top_frame | app/controllers/api/v1/admin/editing_entities_controller.rb:8 |
| deploy | production-us-west-2-20260526t0459z0-dd7bd097-cupixworks |
| env | production, us-west-2 |
| duration | 1034ms (DB: 6.48ms, serialization: 2ms, view: 0.08ms) |
Timeline#
- 2026-05-26T12:24:13Z — APM에서 1034ms 지연 감지
- 2026-05-26T12:24:16Z — 로그 기록: 요청 완료 (200 OK, 1032.32ms)
- 2026-05-26T12:24:17Z — 동일 시간대 다른 호스트에서도 497ms 지연 관측
- 2026-05-27 — RCA 분석 완료
Scoring#
Confidence 85% · Actionability 44%
Confidence#
| Dimension | Score | Detail |
|---|---|---|
| Evidence completeness | 5/5 | 5 code refs, 6 log queries |
| Code path explicitness | 3/3 | 5 file:line refs |
| Log evidence | 3/3 | section, query, pattern |
| RCA structure | 3/3 | 3/3 sections |
| Revision history | 0/3 | 0 revision(s) |
| Agent execution | 3/3 | success |
Actionability#
| Dimension | Score | Detail |
|---|---|---|
| Fix complexity | 5/5 | trivial |
| Affected files | 1/5 | 16 file(s) |
| Single repo | 1/3 | 3 service(s) |
| Immediate actions | 0/3 | absent |
| Testability | 0/3 | no test info |
| External dependency | 1/3 | external deps found |
| Data migration | 3/3 | no migration |