CodingLevel 6
Capacity and traffic
Easynot started
Mediumnot started
Hardnot started
StatusFormatCompany style
Easy
Root filesystem fullOn-call incidentOn-call incident15 minDisk fills after deployOn-call incidentOn-call incident15 minAdmin API slows every afternoon on a burstable instanceOn-call incidentOn-call incident15 minChat server stalls at a thousand connectionsOn-call incidentOn-call incident15 minInvoice emails arrive hours late at month startOn-call incidentOn-call incident15 minMedium
DynamoDB hot partition throttlingOn-call incident · Amazon styleAmazon styleOn-call incidentAmazon style30 minCPU throttling under loadOn-call incidentOn-call incident30 minMemory leak in per-connection cacheOn-call incidentOn-call incident30 minCPU limit reduction throttles throughputOn-call incidentOn-call incident30 minThird-party API quota exhaustedOn-call incident · DoorDash styleDoorDash styleOn-call incidentDoorDash style30 minGitHub API rate limit from shared tokenOn-call incident · Microsoft styleMicrosoft styleOn-call incidentMicrosoft style30 minAccount vCPU quota exceededOn-call incident · Amazon styleAmazon styleOn-call incidentAmazon style30 minAutoscaler ignores queue depthOn-call incident · Amazon styleAmazon styleOn-call incidentAmazon style35 minProvider rate limit on fan-outOn-call incidentOn-call incident30 minInstant traffic wallOn-call incidentOn-call incident35 minDisk space exhaustion from logsOn-call incidentOn-call incident30 minRate limit bucket collisionOn-call incidentOn-call incident35 minHard
Cache hit ratio collapsesOn-call incidentOn-call incident35 minMetrics server down breaks autoscalingOn-call incidentOn-call incident40 minHot partition throttled on demandOn-call incident · Amazon styleAmazon styleOn-call incidentAmazon style40 minCache stampede on viral contentOn-call incidentOn-call incident40 minNo prioritization under overloadOn-call incident · Google styleGoogle styleOn-call incidentGoogle style40 minScale-in terminates in-flight requestsOn-call incidentOn-call incident40 minRetry loop keeps service wedgedOn-call incident · Google styleGoogle styleOn-call incidentGoogle style45 minBackfill throttles live trafficOn-call incident · Amazon styleAmazon styleOn-call incidentAmazon style40 minBroker memory alarm blocks publishesOn-call incidentOn-call incident40 minRSS grows despite stable heapOn-call incidentOn-call incident40 minLatency spikes with regex validationOn-call incidentOn-call incident40 minDirect memory leak in Netty streaming responsesOn-call incidentOn-call incident40 min