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coolvds.com › Blog › DevOps & Infrastructure

Observability vs. Monitoring: Why Green Dashboards Are Lying to You

· CoolVDS Team

Stop relying on static thresholds. Learn why traditional monitoring fails modern stacks and how to implement true observability using Prometheus, ELK, and solid infrastructure. A deep dive for 2018's sysadmins.

coolvds.com › Blog › DevOps & Infrastructure

API Gateway Performance Tuning: Nginx, Lua, and the 10ms Goal

· CoolVDS Team

A battle-hardened guide to tuning your API Gateway for maximum throughput and minimal latency using 2017's best practices. From sysctl kernel tweaks to upstream keepalives, we dissect the stack.

coolvds.com › Blog › DevOps & Infrastructure

Surviving the Spike: Infrastructure Monitoring When "Uptime" Isn't Enough

· CoolVDS Team

It is December 2015. The Safe Harbor agreement is dead. Your servers are taking traffic. If you are still relying on simple ping checks, you are flying blind. Here is how to architect a monitoring stack that actually scales.

coolvds.com › Blog › DevOps & Infrastructure

Visualizing Infrastructure: Moving Beyond Nagios to Grafana 2.0

· CoolVDS Team

Stop staring at static RRDtool graphs. We explore how to deploy the new Grafana 2.0 with InfluxDB on CentOS 7 to visualize high-frequency metrics, monitor CPU steal time, and why I/O performance determines your monitoring stack's survival.

coolvds.com › Blog › DevOps & Infrastructure

Deconstructing the Monolith: Practical Microservices Patterns for 2015

· CoolVDS Team

Moving from a LAMP stack to microservices isn't just about Docker—it's about network architecture. We explore API Gateways, service isolation, and why latency within the Oslo stack matters more than you think.

coolvds.com › Blog › DevOps & Infrastructure

Kubernetes Networking: Solving the Docker Port Conflict Nightmare

· CoolVDS Team

Docker links are broken. Discover how the new Kubernetes 'IP-per-pod' model uses overlays like Flannel to fix container networking, and why your underlying VPS architecture matters more than ever.

coolvds.com › Blog › DevOps & Infrastructure

Beyond Nagios: Why "Green Status" is a Lie and How to Debug Real Latency

· CoolVDS Team

Nagios says your server is UP, but your customers are seeing 504 Gateway Timeouts. In the wake of Heartbleed, we explore deep system introspection using Graphite, Logstash, and strace to find the bottlenecks that simple monitoring misses.

coolvds.com › Blog › Database Management

Database Sharding: Surviving the Traffic Spike When Vertical Scaling Fails

· CoolVDS Team

When your MySQL tables hit 50 million rows and join queries start locking up your CPU, throwing more RAM at the problem won't save you. We dive deep into horizontal sharding strategies, PHP implementation patterns, and why KVM isolation is non-negotiable for high-performance data architectures in 2013.

coolvds.com › Blog › DevOps & Infrastructure

Beyond Green Lights: Why "Up" Status is a Lie and Metrics are the Truth

· CoolVDS Team

Nagios says your server is fine, but your customers are timing out. In 2013, binary monitoring isn't enough. Here is how to implement deep metrics collection using Graphite, StatsD, and SSD-backed infrastructure in Norway.