DEVOPS
Deployment, containers, servers, CI/CD, infrastructure problems diagnosed and fixed.
AWS Bill Doubled Overnight: Complete Diagnosis Guide
You open the AWS billing console and the current month's bill is already double last month's total. Use Cost Explorer, AWS CLI queries, and service-specific checks to pinpoint the source within 30 minutes.
EC2 Costs Suddenly Increased Without Traffic Growth
Your EC2 bill grew 80% but application traffic is unchanged. Walk through instance audits, EBS volume cleanup, Reserved Instance expiry checks, and Savings Plans coverage gaps to find exactly what changed.
RDS Costs Increased Dramatically: Common Causes
Your RDS bill jumped 100-300% with no change in query volume. Trace the increase to Multi-AZ, storage autoscaling, backup retention policy changes, Aurora Serverless ACU scaling, Enhanced Monitoring, or accumulated manual snapshots.
Vercel Deployment Works Locally but Fails in Production
npm run build succeeds on your machine and in CI but Vercel either fails the build or the deployed app crashes immediately. Trace the root cause through environment variable gaps, Edge Runtime module restrictions, function size limits, and runtime version mismatches.
Docker Container Keeps Restarting in Production
Your container starts, crashes, and Docker immediately restarts it over and over. Systematically diagnose OOM kills, missing startup environment variables, health check misconfiguration, dependency race conditions, and PID 1 signal handling to stop the restart loop.
PostgreSQL Performance Degraded After Growth
PostgreSQL performance problems at scale follow a predictable pattern: missing indexes on filter columns, table bloat from deleted rows that autovacuum cannot keep up with, stale statistics causing the query planner to choose sequential scans, and connection pool exhaustion. Each is diagnosable with built-in tools.
Redis Memory Usage Keeps Growing Unexpectedly
Redis memory that grows without bound almost always traces to keys with no TTL, caching of objects that are too large, using Redis as a primary database without expiry policies, or a missing maxmemory-policy. Here is how to find the problem with redis-cli.
Prisma + Vercel: Fixing Connection Pool Exhaustion (P1001 / P1017 Errors)
A Next.js app on Vercel starts throwing P1001 or P1017 errors in production under load. The fix is not what most developers reach for first, here is the correct diagnosis and the exact steps to resolve it.
How to Fix Nginx 502 Bad Gateway Error: Causes and Solutions
A 502 Bad Gateway means Nginx is running but the application behind it is not responding. This is the exact workflow we use to diagnose and fix it in under ten minutes.