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Infrastructure — Case Studies

Nginx, HAProxy, Kubernetes, and cloud infrastructure performance problems. Load balancer misconfiguration, network latency spikes, disk I/O saturation, and auto-scaling failures.

2 Junior1 Middle
🗄️ Database⚙️ Application📊 Monitoring
junior⏱ 20 min

Nginx Load Balancer Misconfiguration

One backend node receives 80% of traffic. Others mostly idle.

NginxLoad Balancingupstream
SOON
middle⏱ 30 min

Disk I/O Saturation Causing Write Stalls

Write latency jumped from 2ms to 800ms. iowait at 80%.

LinuxiostatDisk I/OEBS
SOON
junior⏱ 22 min

Kubernetes OOMKilled — Container Memory Limits

Pods restarting every 15 minutes under load. OOMKilled reason.

KubernetesOOMKillMemory LimitsRequests