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ObservabilityLevel 5Open topic

Label freshness reads zeroHardOn-call incidentStripe styleOn-call incidentStripe styleHard35 minGray failure disk awaitHardOn-call incidentAmazon styleOn-call incidentAmazon styleHard40 min

Capacity and trafficLevel 6Open topic

Cache hit ratio collapsesHardOn-call incidentOn-call incidentHard35 minMetrics server down breaks autoscalingHardOn-call incidentOn-call incidentHard40 minHot partition throttled on demandHardOn-call incidentAmazon styleOn-call incidentAmazon styleHard40 minCache stampede on viral contentHardOn-call incidentOn-call incidentHard40 minNo prioritization under overloadHardOn-call incidentGoogle styleOn-call incidentGoogle styleHard40 minScale-in terminates in-flight requestsHardOn-call incidentOn-call incidentHard40 minRetry loop keeps service wedgedHardOn-call incidentGoogle styleOn-call incidentGoogle styleHard45 minBackfill throttles live trafficHardOn-call incidentAmazon styleOn-call incidentAmazon styleHard40 minBroker memory alarm blocks publishesHardOn-call incidentOn-call incidentHard40 minRSS grows despite stable heapHardOn-call incidentOn-call incidentHard40 min

Latency spikes with regex validationHardOn-call incidentOn-call incidentHard40 minDirect memory leak in Netty streaming responsesHardOn-call incidentOn-call incidentHard40 minStream consumer OOMKilled on restartHardOn-call incidentDatabricks styleOn-call incidentDatabricks styleHard40 minAutoscaler removal spiral during rampHardOn-call incidentOn-call incidentHard40 minRemote socket memory access latencyHardOn-call incidentOn-call incidentHard40 minHPA oscillation with aggressive scale-downHardOn-call incidentOn-call incidentHard35 minCanary traffic skew blind spotHardOn-call incidentStripe styleOn-call incidentStripe styleHard35 minSidecar memory climbingHardOn-call incidentOn-call incidentHard45 minOutlier detection cascades pod ejectionHardOn-call incidentGoogle styleOn-call incidentGoogle styleHard45 minHPA oscillates near target thresholdHardOn-call incidentOn-call incidentHard30 minPods stuck pending during scale-upHardOn-call incidentAmazon styleOn-call incidentAmazon styleHard30 minRetry storm locks in saturationHardOn-call incidentGoogle styleOn-call incidentGoogle styleHard32 minFanout amplifies downstream loadHardOn-call incidentOn-call incidentHard30 minLoad balancer registration cappedHardOn-call incidentOn-call incidentHard28 minGarbage collection pauses degradeHardOn-call incidentOn-call incidentHard28 minDisk full truncates log recordsHardOn-call incidentOn-call incidentHard40 minRegex catastrophic backtracking on inputHardOn-call incidentOn-call incidentHard30 minMetric label cardinality explosionHardOn-call incidentOn-call incidentHard35 minRetry loop after recoveryHardOn-call incidentOn-call incidentHard35 minColocated workload interferenceHardOn-call incidentOn-call incidentHard40 minSidecar CPU throttlingHardOn-call incidentOn-call incidentHard40 minRetry amplification after vendor blipHardOn-call incidentOn-call incidentHard35 minAutoscale metric lag during rampHardOn-call incidentOn-call incidentHard30 minIAM throttling during instance bootstrapHardOn-call incidentAmazon styleOn-call incidentAmazon styleHard30 minWarm pool depleted by deployHardOn-call incidentAmazon styleOn-call incidentAmazon styleHard30 minHPA and VPA thrashingHardOn-call incidentOn-call incidentHard30 minIn-flight requests drop during scale-inHardOn-call incidentOn-call incidentHard30 minRegional quota exhaustion on surgeHardOn-call incidentAmazon styleOn-call incidentAmazon styleHard30 minClient retry amplifies traffic surgeHardOn-call incidentGoogle styleOn-call incidentGoogle styleHard30 minAutoscaler sees stale metricsHardOn-call incidentOn-call incidentHard30 minNoisy neighbor starves podHardOn-call incidentOn-call incidentHard30 minShared dependency saturates on surgeHardOn-call incidentNetflix styleOn-call incidentNetflix styleHard30 minFixed-window limiter allows burstHardOn-call incidentStripe styleOn-call incidentStripe styleHard30 minGPU autoscaler CPU metric mismatchHardOn-call incidentOpenAI styleOn-call incidentOpenAI styleHard35 minFailing disk tail latencyHardOn-call incidentOn-call incidentHard35 minS3 prefix throttling on burstHardOn-call incidentAmazon styleOn-call incidentAmazon styleHard35 minDDoS volumetric attackHardOn-call incidentOn-call incidentHard40 minFalse sharing kills throughputHardOn-call incidentCitadel styleOn-call incidentCitadel styleHard45 min