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Lessons Learned

Real production failures. Real lessons learned.

Every incident at 3 AM teaches us something. These 40 stories cover Redis meltdowns, microservices regrets, cloud cost disasters, and Kubernetes catastrophes.

Redis Cache Overload Kills Database

Redis Noeviction OOM Crash

Cache Complexity Trade-offs

Stale Cache Data Nightmare

Cache Invalidation Nightmare

Multi-Layer Caching Failure

Rate Limiter Redis Crash

Session Storage Redis Migration

Spot Instance Black Friday Disaster

CloudWatch $50K Bill Shock

Multi-Region Nobody Used

Debug Logging Cost Explosion

Staging Costs More Than Production

VPC Egress Surprise Bill

Autoscaling Kills Database

Health Check Overload

ConfigMap Typo Outage

Docker Image Vulnerabilities

High Availability That Wasn't

Cross-AZ Traffic Bill

Pod Eviction Cascade

Ingress Controller SPOF

Microservices #23

Microservices for Wrong Reasons

Microservices #24

Consolidating Microservices Risk

Microservices #25

Scaling Tiny Database

Microservices #26

20K Microservices Migration

Microservices #27

Splitting Monolith Backfires

Microservices #28

Partial Failures Hell

Microservices #29

1K to 10K Complexity Jump

Microservices #30

Microservices for Tiny Team

Microservices #31

Microservices Overkill

Microservices #32

Microservices Organizational Mismatch

Architecture #33

Blue-Green Config Drift

Architecture #34

Lambda Cold Start Latency

Architecture #35

Service Mesh Overhead

Architecture #36

Serverless Lock-In Reality

Architecture #37

Blue-Green Database Nightmare

Architecture #38

Cache That Added Latency

Architecture #39

Event Sourcing for CRUD

Architecture #40

Horizontal Scaling Bottleneck