Practical Engineering Solutions & Systems Deep-Dives
Production-tested troubleshooting, cloud architecture, and modern backend engineering notes without the fluff.
Resolving Docker & Kubernetes Exit Code 137 (OOMKilled): Root Cause & JVM Memory Tuning
When your production container abruptly terminates with exit code 137, increasing -Xmx usually makes it crash faster. Here is how Linux cgroups v2, off-heap buffers, and contain...
Debugging PostgreSQL Deadlocks: Root Cause, Row-Level Lock Queues & Advisory Locks
When PostgreSQL throws 'deadlock detected: Process 4120 waits for ShareLock on transaction', simply retrying hides race conditions. Here is how row-level lock trees and foreign ...
Fixing Kubernetes Pod Evictions and CrashLoopBackOff: Ephemeral Storage Limits & EmptyDir Sizing
When your Kubernetes pods suddenly enter an Evicted or CrashLoopBackOff state due to 'ephemeral-storage exceeded', increasing CPU or RAM limits will not prevent node drain. Here...