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Latest from Ops Community

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Ops Community

Mar 31, 2026 · Operations

Mastering Ansible: From Core Concepts to Custom Modules and Plugins

Explore a comprehensive guide to advancing your Ansible skills, covering inventory formats, playbook structures, variable precedence, Jinja2 templating, custom lookup and callback plugins, dynamic inventory scripting, asynchronous execution, performance tuning with Mitogen, and enterprise‑grade platform design with AWX/Tower.

Configuration ManagementCustom ModulesDevOps

0 likes · 34 min read

Mastering Ansible: From Core Concepts to Custom Modules and Plugins

Ops Community

Mar 29, 2026 · Operations

Why DNS Lookups Fail and How to Fix Them: A Complete Troubleshooting Guide

This guide explains the DNS resolution process, categorises common failure types, provides step‑by‑step troubleshooting procedures, essential commands, configuration examples for systemd‑resolved, BIND9, Unbound and CoreDNS, and offers best‑practice recommendations for reliable DNS operation in Linux and Kubernetes environments.

DNSKubernetesLinux

0 likes · 50 min read

Why DNS Lookups Fail and How to Fix Them: A Complete Troubleshooting Guide

Ops Community

Mar 27, 2026 · Backend Development

Master Nginx Reverse Proxy on Ubuntu 24.04 & Rocky Linux 9.4 – From Installation to Monitoring

This comprehensive guide walks you through installing Nginx 1.27 on Ubuntu 24.04 LTS and Rocky Linux 9.4, configuring reverse proxy, load balancing, SSL/TLS, WebSocket and gRPC support, tuning kernel and Nginx parameters, setting up health checks, high‑availability with Keepalived, and monitoring with Prometheus and Grafana, all with ready‑to‑use code snippets and scripts.

MonitoringPerformance tuningSSL

0 likes · 59 min read

Master Nginx Reverse Proxy on Ubuntu 24.04 & Rocky Linux 9.4 – From Installation to Monitoring

Ops Community

Mar 14, 2026 · Operations

How to Diagnose, Clean, and Prevent Docker Log Disk Exhaustion

This guide walks you through identifying which Docker containers are consuming disk space, safely truncating oversized log files, configuring log drivers and rotation policies, setting up centralized logging, and automating cleanup to avoid future disk‑full incidents in production environments.

ContainerDevOpsDocker

0 likes · 33 min read

How to Diagnose, Clean, and Prevent Docker Log Disk Exhaustion

Ops Community

Mar 13, 2026 · Backend Development

How to Diagnose and Fix Slow LLM Inference: A Full‑Stack Performance Guide

This article presents a comprehensive, step‑by‑step methodology for troubleshooting and optimizing large‑language‑model inference performance, covering GPU, CPU, memory, network, configuration, and application layers, with concrete benchmark scripts, diagnostic commands, and real‑world case studies.

CPUDebuggingGPU

0 likes · 48 min read

How to Diagnose and Fix Slow LLM Inference: A Full‑Stack Performance Guide

Ops Community

Mar 8, 2026 · Databases

How to Diagnose and Fix MySQL Production Performance Drops

This comprehensive guide walks you through identifying the root causes of MySQL performance degradation in production, from gathering baseline metrics and analyzing slow‑query logs to examining execution plans, tuning parameters, applying configuration changes, and verifying improvements with concrete monitoring and backup strategies.

Database OptimizationPerformance tuningbackup

0 likes · 30 min read

How to Diagnose and Fix MySQL Production Performance Drops

Ops Community

Mar 6, 2026 · Databases

Master MySQL Index Optimization: Deep Dive into EXPLAIN Execution Plans

This article provides a hands‑on guide to MySQL index optimization, deeply exploring EXPLAIN execution plans, new features in MySQL 8/8.4, practical index design principles, step‑by‑step SQL examples, common pitfalls, advanced techniques like functional and descending indexes, and comprehensive monitoring and troubleshooting strategies.

Database PerformanceEXPLAINIndex Optimization

0 likes · 28 min read

Master MySQL Index Optimization: Deep Dive into EXPLAIN Execution Plans

Ops Community

Mar 3, 2026 · Databases

Master PostgreSQL 17: Installation, Backup, Recovery, and Performance Tuning

This comprehensive guide walks you through PostgreSQL 17 deployment, explains its multi‑process architecture and MVCC model, details environment requirements, shows essential configuration parameters, provides step‑by‑step backup and PITR procedures, demonstrates streaming replication setup, and shares best‑practice tuning, security, and monitoring tips for reliable production use.

Database AdministrationHAPerformance tuning

0 likes · 24 min read

Master PostgreSQL 17: Installation, Backup, Recovery, and Performance Tuning

Ops Community

Mar 2, 2026 · Backend Development

How to Supercharge Tomcat 11 on JDK 21: Real‑World JVM, Connection Pool, and Virtual Thread Tuning

This guide walks you through practical performance tuning of Tomcat 11 on JDK 21, covering JVM memory settings, GC selection, connector and thread‑pool optimization, virtual‑thread integration, benchmark scripts, security hardening, high‑availability deployment, and comprehensive monitoring and troubleshooting techniques.

DockerJDK21JVM

0 likes · 51 min read

How to Supercharge Tomcat 11 on JDK 21: Real‑World JVM, Connection Pool, and Virtual Thread Tuning

Ops Community

Feb 25, 2026 · Databases

Hardening MySQL 8.4: Permissions, SSL, Auditing & Compliance Guide

This guide provides a step‑by‑step, production‑ready hardening plan for MySQL 8.4, covering permission hierarchy design, strong password policies, audit‑log configuration, TLS encryption, network access controls, firewall rules, backup scripts, monitoring metrics, and best‑practice recommendations to meet PCI‑DSS and Chinese GB/T 22239 compliance.

ComplianceHardeningTLS

0 likes · 27 min read

Hardening MySQL 8.4: Permissions, SSL, Auditing & Compliance Guide