devops -

Troubleshooting Redis Maxmemory OOM Errors Eviction Policies and Memory Optimization

Redis has become a fundamental pillar of modern full-stack web architectures, serving as a high-performance, in-memory key-value store for caching layers, session management, and pub/sub message brokers. Operating entirely within the host’s RAM allows Redis to deliver sub-millisecond read and write latencies. However, this absolute reliance on memory introduces a critical infrastructure vulnerability: Memory Exhaustion….

FastAPI infrastructure diagram illustrating a background task blocking the single-threaded asynchronous event loop.

Eliminating FastAPI Event Loop Blocking inside Background Tasks

Ghullam Mustafa3 days ago110 mins

FastAPI has grown into one of the most popular modern web frameworks for building high-performance AI backends and microservices, thanks to its native support for asynchronous programming (async/await) and standard ASGI servers like Uvicorn. However, scaling a high-throughput FastAPI application often exposes a subtle concurrency bottleneck: Event Loop Blocking. This architectural flaw typically surfaces when…

Kubernetes cluster diagram showing a container pod stuck in a pending scheduling state due to resource starvation or taint mismatch.

Deconstructing Kubernetes Pod ‘Pending’ States: Infrastructure Triage and Fixes

Ghullam Mustafa3 days ago17 mins

Deploying microservices to a Kubernetes (K8s) cluster provides unparalleled scalability and container orchestration. However, when a rolling deployment stalls and your pods get stuck indefinitely in the Pending state, your continuous deployment pipeline grinds to an immediate halt. Unlike runtime execution failures like CrashLoopBackOff or ImagePullBackOff, a Pending state indicates that the Kubernetes scheduler (kube-scheduler)…

Abstract technical diagram representing PostgreSQL connection pool exhaustion and database leaks when deploying Prisma ORM in serverless functions.

Mitigating PostgreSQL Connection Pool Exhaustion in Serverless via Prisma ORM

Ghullam Mustafa3 days ago18 mins

The shift toward serverless architectures (like AWS Lambda, Vercel, and Netlify) has drastically simplified deployment pipelines and autoscaling. However, pairing a stateless, highly ephemeral serverless function with a traditional stateful relational database like PostgreSQL introduces critical infrastructure challenges. The most common and devastating failure pattern full-stack engineers encounter is database connection pool exhaustion, frequently manifested…

Full-Stack

How to Fix Docker Container OOM Kills (Exit Code 137) in Python AI Deployments

Ghullam Mustafa4 days ago1 day ago05 mins

Deploying heavy Python generative AI applications or data science models inside Docker containers is standard cloud infrastructure practice. However, engineering teams frequently hit a critical deployment failure during runtime scaling: Docker container crashes triggered by an Out-of-Memory (OOM) event, explicitly logged as Exit Code 137. Exit Code 137 indicates that the host operating system’s kernel…