[{"id":"IL-0451","title":{"en":"Setting indexes INVISIBLE on Aurora MySQL 3.10 spiked CPU and ReadIOPS on all three readers but not on the writer","ko":"Aurora MySQL 에서 인덱스를 INVISIBLE 로 바꿀 때마다 Reader 3대의 버퍼풀이 무효화돼 CPU 와 ReadIOPS 가 튀었다"},"org":"Daangn","org_slug":"daangn","date":"2026-10-06","severity":"unknown","root_cause":"software-bug","url":"https://benchlet.com/incidentlib/app/cases/IL-0451","shared_components":["database"]},{"id":"IL-0281","title":{"en":"PostHog's Logs ClickHouse cluster silently deleted almost all its S3 data, losing US logs older than 3 days","ko":"PostHog US 리전 Logs 제품의 ClickHouse 클러스터가 S3 에 둔 로그 데이터를 거의 다 지워 3일보다 오래된 로그가 사라졌다"},"org":"PostHog","org_slug":"posthog","date":"2026-02-19","severity":"unknown","root_cause":"software-bug","url":"https://benchlet.com/incidentlib/app/cases/IL-0281","shared_components":["database"]},{"id":"IL-0310","title":{"en":"An Aurora PostgreSQL failover to an upsized reader reversed twice and backend writes failed in read-only transactions","ko":"Aurora PostgreSQL 의 수동 장애 조치가 스스로 되돌아가 원래 writer 가 남고 백엔드의 쓰기 쿼리가 실패했다"},"org":"Hightouch","org_slug":"hightouch","date":"2025-10-23","severity":"unknown","root_cause":"software-bug","url":"https://benchlet.com/incidentlib/app/cases/IL-0310","shared_components":["database"]},{"id":"IL-0150","title":{"en":"A latent race condition in DynamoDB's DNS automation left an empty DNS record for dynamodb.us-east-1.amazonaws.com, and the DynamoDB and EC2 launch failures that followed caused EKS, ECS and Fargate container launch failures and cluster scaling delays in us-east-1","ko":"DynamoDB DNS 자동화의 경쟁 조건이 us-east-1 리전 엔드포인트의 DNS 레코드를 비워 DynamoDB 와 EC2 인스턴스 시작이 실패했고, 그 여파로 EKS, ECS, Fargate 의 컨테이너 시작과 클러스터 스케일링이 14시간 넘게 막혔다"},"org":"Amazon Web Services","org_slug":"amazon-web-services","date":"2025-10-19","severity":"unknown","root_cause":"software-bug","url":"https://benchlet.com/incidentlib/app/cases/IL-0150","shared_components":["database"]},{"id":"IL-0436","title":{"en":"A supremum lock left by ROLLBACK TO SAVEPOINT in a long transaction blocked inserts and filled Aurora MySQL connections","ko":"Aurora MySQL 에서 INSERT 가 supremum 락에 막혀 커넥션이 고갈되고 freee 웹 서비스 전체가 다운되었다"},"org":"freee","org_slug":"freee","date":"2025-08-27","severity":"unknown","root_cause":"software-bug","url":"https://benchlet.com/incidentlib/app/cases/IL-0436","shared_components":["database"]},{"id":"IL-0527","title":{"en":"OpenStreetMap.org made no replication diffs for 16 hours as PostgreSQL logical decoding failed on a memory alloc error","ko":"OpenStreetMap.org 의 복제 diff 생성이 invalid memory alloc request size 오류로 16시간 멈춤"},"org":"OpenStreetMap Foundation","org_slug":"openstreetmap-foundation","date":"2025-06-25","severity":"unknown","root_cause":"software-bug","url":"https://benchlet.com/incidentlib/app/cases/IL-0527","shared_components":["database"]},{"id":"IL-0329","title":{"en":"A routine migration left PGAudit stuck holding Postgres locks, causing intermittent timeouts and a 2-minute outage","ko":"Postgres 17 업그레이드 뒤 다시 켠 PGAudit 가 마이그레이션 중 락을 쥔 채 멈춰, 서비스 전반이 느려지고 데이터베이스가 2분 동안 내려갔다"},"org":"incident.io","org_slug":"incident-io","date":"2025-04-09","severity":"unknown","root_cause":"software-bug","url":"https://benchlet.com/incidentlib/app/cases/IL-0329","shared_components":["database"]},{"id":"IL-0347","title":{"en":"About 25% of Scaleway FR-PAR-1 hypervisors lost VPC connectivity when both VPC BGP route reflectors got stuck","ko":"FR-PAR-1 가용 영역에서 하이퍼바이저 약 25% 의 VPC 연결이 11분 동안 끊겼다"},"org":"Scaleway","org_slug":"scaleway","date":"2024-10-18","severity":"unknown","root_cause":"software-bug","url":"https://benchlet.com/incidentlib/app/cases/IL-0347","shared_components":["database"]},{"id":"IL-0373","title":{"en":"Heroku Postgres Essential-tier databases in the EU region ran out of memory and refused connections, twice in four days","ko":"EU 리전의 Heroku Postgres Essential 등급 데이터베이스가 메모리가 바닥나 두 번에 걸쳐 연결을 받지 못했다"},"org":"Heroku","org_slug":"heroku","date":"2024-07-27","severity":"unknown","root_cause":"software-bug","url":"https://benchlet.com/incidentlib/app/cases/IL-0373","shared_components":["database"]},{"id":"IL-0024","title":{"en":"Expensive cache-backed API calls and uncancelled database requests overloaded MongoDB and took the Hugging Face Hub down three times","ko":"무거운 API 요청이 MongoDB 에 과부하를 걸고 취소되지 않은 요청이 쌓여 Hugging Face Hub 가 사흘 동안 세 번 멈췄다"},"org":"Hugging Face","org_slug":"hugging-face","date":"2024-04-22","severity":"unknown","root_cause":"software-bug","url":"https://benchlet.com/incidentlib/app/cases/IL-0024","shared_components":["database"]},{"id":"IL-0217","title":{"en":"Honeycomb's main MySQL database locked up under cache-miss reads and ran out of connections, a 68-minute total outage","ko":"스키마 캐시가 데워지지 않아 주 MySQL 데이터베이스가 내부 교착에 빠지고 Honeycomb 전체가 68분 동안 멈췄다"},"org":"Honeycomb","org_slug":"honeycomb","date":"2023-07-25","severity":"unknown","root_cause":"software-bug","url":"https://benchlet.com/incidentlib/app/cases/IL-0217","shared_components":["database"]},{"id":"IL-0330","title":{"en":"Requests timed out for two weeks waiting on Go's database/sql connection pool, one for almost 20 seconds","ko":"Go database/sql 커넥션 풀을 기다리던 요청이 2주 동안 간헐적으로 타임아웃됐고, 한 요청은 거의 20초를 기다렸다"},"org":"incident.io","org_slug":"incident-io","date":"2023-04-20","severity":"unknown","root_cause":"software-bug","url":"https://benchlet.com/incidentlib/app/cases/IL-0330","shared_components":["database"]},{"id":"IL-0385","title":{"en":"GitHub MySQL read replicas hit a semaphore deadlock during a schema migration's table rename and kept crash-recovering","ko":"큰 MySQL 테이블의 스키마 마이그레이션 마지막 단계에서 읽기 복제본 다수가 semaphore deadlock 에 걸려 GitHub 핵심 서비스가 2시간 50분 저하됐다"},"org":"GitHub","org_slug":"github","date":"2021-11-27","severity":"unknown","root_cause":"software-bug","url":"https://benchlet.com/incidentlib/app/cases/IL-0385","shared_components":["database"]},{"id":"IL-0462","title":{"en":"Some MySQL pods on Shopify's GKE clusters took up to 30 minutes to start, slowing instance replacement","ko":"GKE 위 MySQL 파드 일부가 시작과 종료에 오래 걸려 KateSQL 인스턴스 교체가 느려졌다"},"org":"Shopify","org_slug":"shopify","date":"2021-10-21","severity":"unknown","root_cause":"software-bug","url":"https://benchlet.com/incidentlib/app/cases/IL-0462","shared_components":["database"]},{"id":"IL-0196","title":{"en":"Adding a second Redis replica and lowering memory limits in one RedisFailover change restarted the only Redis pod that held data, and Sentinel promoted the empty new replica, erasing the data","ko":"Redis Operator 로 레플리카를 늘리면서 메모리 한도를 낮추자 데이터를 가진 유일한 Redis 파드가 재시작됐고, Sentinel 이 빈 레플리카를 마스터로 올려 데이터가 모두 지워졌다."},"org":"Palark","org_slug":"palark","date":"2020-03-13","severity":"unknown","root_cause":"software-bug","url":"https://benchlet.com/incidentlib/app/cases/IL-0196","shared_components":["database"]},{"id":"IL-0486","title":{"en":"Figma's PostgreSQL 9 database on RDS slowed under high write IOPS and lock contention until the site was unavailable","ko":"Figma의 PostgreSQL 데이터베이스에서 쓰기 IOPS와 락 경합이 치솟아 서비스가 하루 동안 여러 번 내려갔다"},"org":"Figma","org_slug":"figma","date":"2020-01-22","severity":"unknown","root_cause":"software-bug","url":"https://benchlet.com/incidentlib/app/cases/IL-0486","shared_components":["database"]},{"id":"IL-0241","title":{"en":"A database shard could not elect a new primary, and the Stripe API failed most requests in two periods on one day","ko":"데이터베이스 shard 하나가 primary 를 뽑지 못해 Stripe API 요청 대부분이 두 차례 실패했다"},"org":"Stripe","org_slug":"stripe","date":"2019-07-10","severity":"unknown","root_cause":"software-bug","url":"https://benchlet.com/incidentlib/app/cases/IL-0241","shared_components":["database"]},{"id":"IL-0439","title":{"en":"Database access slowed after each block device and filesystem expansion because the Linux kernel dropped the page cache","ko":"블록 디바이스와 파일 시스템을 확장할 때마다 데이터베이스 접근이 한동안 느려졌다"},"org":"Cybozu","org_slug":"cybozu","date":"2018-06-28","severity":"unknown","root_cause":"software-bug","url":"https://benchlet.com/incidentlib/app/cases/IL-0439","shared_components":["database"]},{"id":"IL-0388","title":{"en":"A Google Cloud live migration took a Discord Redis primary offline, and the failover broke API instances and then guilds","ko":"Redis 고가용 클러스터의 primary 노드가 내려간 뒤 Discord API 가 느려지고 길드 일부가 오프라인으로 보이며 접속이 실패했다"},"org":"Discord","org_slug":"discord","date":"2017-10-13","severity":"unknown","root_cause":"software-bug","url":"https://benchlet.com/incidentlib/app/cases/IL-0388","shared_components":["database"]},{"id":"IL-0454","title":{"en":"Baemin billing servers could not open new MariaDB connections at the start of a card-discount event","ko":"배민 카드사 할인 이벤트가 시작되자 빌링 시스템이 MariaDB 에 새 커넥션을 맺지 못해 결제 요청 일부가 실패했다"},"org":"Woowa Brothers","org_slug":"woowa-brothers","date":"2016-12-08","severity":"unknown","root_cause":"software-bug","url":"https://benchlet.com/incidentlib/app/cases/IL-0454","shared_components":["database"]},{"id":"IL-0536","title":{"en":"Amazon SimpleDB in US East returned HTTP 500 to nearly all API calls for two hours after its nodes left the cluster","ko":"US East 의 Amazon SimpleDB 가 두 시간 동안 거의 모든 API 호출에 실패했다"},"org":"Amazon Web Services","org_slug":"amazon-web-services","date":"2014-06-13","severity":"unknown","root_cause":"software-bug","url":"https://benchlet.com/incidentlib/app/cases/IL-0536","shared_components":["database"]},{"id":"IL-0485","title":{"en":"Dropbox went down when an OS upgrade script reinstalled active MySQL master-replica pairs and backup restores ran slow","ko":"계획된 OS 업그레이드 작업이 운영 중인 데이터베이스 서버를 재설치해 Dropbox 서비스가 멈췄다"},"org":"Dropbox","org_slug":"dropbox","date":"2014-01-10","severity":"unknown","root_cause":"software-bug","url":"https://benchlet.com/incidentlib/app/cases/IL-0485","shared_components":["database"]},{"id":"IL-0589","title":{"en":"Every Kickstarter MySQL replica on Amazon RDS stopped replicating on a duplicate-key error in the backings table","ko":"Kickstarter 의 모든 MySQL 복제본이 중복 키 오류로 복제를 멈췄다"},"org":"Kickstarter","org_slug":"kickstarter","date":"2013-03-07","severity":"unknown","root_cause":"software-bug","url":"https://benchlet.com/incidentlib/app/cases/IL-0589","shared_components":["database"]},{"id":"IL-0303","title":{"en":"GitHub's MySQL master failed over to a node with a cold buffer pool during a schema migration and GitHub.com went down","ko":"GitHub 의 새 3노드 MySQL 클러스터에서 자동 페일오버가 잘못 일어나고 클러스터 상태가 갈라져 GitHub.com 이 두 번 멈췄다"},"org":"GitHub","org_slug":"github","date":"2012-09-10","severity":"unknown","root_cause":"software-bug","url":"https://benchlet.com/incidentlib/app/cases/IL-0303","shared_components":["database"]}]