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Not-null constraint version skewHardOn-call incidentOn-call incidentHard40 minConnection slots reserved errorHardOn-call incidentOn-call incidentHard35 minConnection pool default shrinkHardOn-call incidentOn-call incidentHard35 minOrder service latency spikesHardOn-call incidentOn-call incidentHard40 minUpstream scale-in closes pooled connectionsHardOn-call incidentOn-call incidentHard40 minBlack Friday autoscaling exhausts database connectionsHardOn-call incidentShopify styleOn-call incidentShopify styleHard30 minConnection pool reconnect stormHardOn-call incidentOn-call incidentHard28 minSchema migration half-applied across shardsHardOn-call incidentOn-call incidentHard40 minReplication lag from backfillHardOn-call incidentOn-call incidentHard35 minDivergent data after failoverHardOn-call incidentOn-call incidentHard40 minFile descriptors climb toward limitHardOn-call incidentOn-call incidentHard35 minOutbound connects fail EADDRNOTAVAILHardOn-call incidentOn-call incidentHard35 minPostgres pool pinned at capacityHardOn-call incidentOn-call incidentHard30 minMesh sidecar cannot assign addressHardOn-call incidentOn-call incidentHard35 minLogical replication slot stuckHardOn-call incidentOn-call incidentHard40 minQuery plan degrades after autovacuumHardOn-call incidentOn-call incidentHard35 minFailover connection pool spikeHardOn-call incidentOn-call incidentHard35 minOrders lost after failoverHardOn-call incidentStripe styleOn-call incidentStripe styleHard40 minIndex corruption after OS upgradeHardOn-call incidentOn-call incidentHard40 minLogical replication lag bulk updateHardOn-call incidentOn-call incidentHard35 minCheckpoint latency spikesHardOn-call incidentOn-call incidentHard35 minPartition pruning regressionHardOn-call incidentOn-call incidentHard35 minLong query blocking transaction poolHardOn-call incidentOn-call incidentHard40 minBackfill incomplete at code cutoverHardOn-call incidentOn-call incidentHard40 minStreaming clients thundering herdHardOn-call incidentOn-call incidentHard40 minEnum value old client rejectionHardOn-call incidentOn-call incidentHard40 minReplication lag read inconsistencyHardOn-call incidentNetflix styleOn-call incidentNetflix styleHard40 minRace condition in refactored order write pathHardOn-call incidentOn-call incidentHard45 minModel approval rate doubles overnightHardOn-call incidentCapital One styleOn-call incidentCapital One styleHard35 minReplication lag from batchHardOn-call incidentOn-call incidentHard35 minStorage node rebalance cascadesHardOn-call incidentOn-call incidentHard40 minStandby promotion stalledHardOn-call incidentOn-call incidentHard45 minQuery plan stale statisticsHardOn-call incidentOn-call incidentHard40 minSingle partition throttledHardOn-call incidentAmazon styleOn-call incidentAmazon styleHard45 minMigration holding exclusive lockHardOn-call incidentOn-call incidentHard40 minTransaction ID wraparound approachingHardOn-call incidentOn-call incidentHard45 minData lost in async failoverHardOn-call incidentStripe styleOn-call incidentStripe styleHard45 minInserts fail on month boundaryHardOn-call incidentOn-call incidentHard40 minQuery model embedding mismatchHardOn-call incidentOpenAI styleOn-call incidentOpenAI styleHard35 minNAT connection timeoutHardOn-call incidentOn-call incidentHard40 minPostgres WAL directory fills diskHardOn-call incidentOn-call incidentHard35 minElasticsearch OOM from expensive aggregationHardOn-call incidentOn-call incidentHard40 minConnection pool exhaustion after autoscaleHardOn-call incidentOn-call incidentHard35 minConnection churn from sidecar keepalive misconfigurationHardOn-call incidentOn-call incidentHard40 minQuery plan regression post-loadHardOn-call incidentOn-call incidentHard35 minPlan cache parameter sensitivityHardOn-call incidentMicrosoft styleOn-call incidentMicrosoft styleHard35 minLogical replication apply lag explodesHardOn-call incidentOn-call incidentHard40 minSequence reached maximum valueHardOn-call incidentOn-call incidentHard35 minReplica replay lag growingHardOn-call incidentOn-call incidentHard35 minPrepared statement plan varianceHardOn-call incidentOn-call incidentHard35 min