🏗️

Infrastructure Bottlenecks

Network, disk, and load balancer analysis

📚 3 cases⏱ 5 hoursJunior → Middle2 Junior1 Middle

Cases in this track

01
junior⏱ 20 min

Nginx Load Balancer Misconfiguration

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

NginxLoad Balancingupstream
02
junior⏱ 22 min

Kubernetes OOMKilled — Container Memory Limits

Pods restarting every 15 minutes under load. OOMKilled reason.

KubernetesOOMKillMemory Limits
03
middle⏱ 30 min

Disk I/O Saturation Causing Write Stalls

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

LinuxiostatDisk I/OEBS
Start Track →