Linux ops automation, cloud-native, Kubernetes, SRE, DevOps, Python, Golang and related tech discussions.
This article analyzes why vLLM's PagedAttention can cause GPU memory fragmentation and out‑of‑memory errors in production, presents four typical OOM scenarios, and provides concrete diagnostics, configuration tweaks, code examples, and monitoring strategies to eliminate the problem.
This article demystifies Linux memory management by explaining why buffers and cache are not meant to be manually cleared, how the 'available' metric differs from 'free', and which sysctl parameters and cgroup settings you should tune to optimize performance and avoid OOM incidents.
This article walks through the root causes of MySQL master‑slave replication delay, demonstrates step‑by‑step diagnostics using SHOW SLAVE STATUS, pt‑heartbeat, and binlog comparisons, and provides concrete configuration changes, query rewrites, hardware upgrades, and monitoring scripts that can shrink lag from dozens of seconds to sub‑millisecond levels.
This guide shows how to dramatically reduce container image size using Docker multi‑stage builds, choose minimal base images, automatically generate SPDX/CycloneDX SBOMs, sign images with Cosign, and integrate the whole process into CI/CD pipelines for secure, lightweight deployments.
This guide walks through the differences between 4‑layer (TCP) and 7‑layer (HTTP) load balancing in Nginx, explains when to use each, and provides step‑by‑step configuration examples, health‑check setups, performance tuning, SSL handling, WebSocket support, and common pitfalls.
This guide explains how to use Prometheus Recording Rules to pre‑compute, aggregate, and smooth metrics in large‑scale microservice environments, cutting daily alert noise by up to 70% through hierarchical alert design, practical examples, and best‑practice recommendations.
This article presents a complete SRE on‑call handbook that defines alert severity levels, provides concrete Prometheus Alertmanager configurations, outlines a step‑by‑step response flow, details war‑room roles, escalation paths, handoff checklists, post‑mortem procedures, and dozens of ready‑to‑use templates to reduce MTTR and improve reliability.
This article walks through a real‑world performance bottleneck on a high‑traffic e‑commerce platform, explains step‑by‑step deep tuning of Nginx Ingress Controller, compares it with Envoy Gateway, and provides concrete configurations, benchmark results, monitoring rules, and best‑practice recommendations for Kubernetes Ingress optimization.
This guide walks you through replacing a heavyweight ELK stack with a minimal Grafana‑Loki logging solution, covering environment requirements, installation of Loki and Promtail, configuration details, best‑practice tips, troubleshooting, and backup strategies for reliable log aggregation.
This guide presents a step‑by‑step, standardized process for detecting, analyzing, and fixing sudden CPU usage spikes on Linux servers, covering preparation, quick identification, deep thread‑level investigation, stack and system‑call analysis, flame‑graph generation, emergency mitigation, and best‑practice recommendations.
