Tutorials
In-depth technical tutorials, guides, and infrastructure best practices.
Why Your Dashboards Stay Green During Real Outages and How To Fix It
Stop monitoring from missing outages by running checks from outside your stack, testing real user journeys, and wiring alerts into on‑call and incident workflows instead of a quiet dashboard.
How to Build Multi Region Hosting Architecture
Design multi‑region hosting by starting from RTO/RPO, then adding active‑active or active‑passive regions with cross‑region data replication, DNS‑based failover, and IaC‑driven, regularly tested failover runbooks.
Troubleshooting MetalLB External IP Assignment on Bare Metal Kubernetes
Fix MetalLB external IP issues by ensuring a valid IPAddressPool and L2/BGP advertisement exist, the pool’s subnet matches your nodes, and kube-proxy, node labels, and MetalLB pods are all correctly configured.
How to Prevent Slow Queries and Downtime in Large Databases with PostgreSQL Autovacuum Tuning
Fix PostgreSQL table bloat by monitoring dead tuples, then tuning autovacuum per hot table with lower scale factors, lower thresholds, and more frequent workers instead of relying on risky manual VACUUM FULL.
Stop Table Full Errors: Conntrack Configuration for High-Traffic Dedicated Servers
Fix conntrack table full by right‑sizing nf_conntrack_max to your RAM, shortening timeouts for stale flows, and cleaning up misconfigured or abusive traffic that explodes connection states.
MySQL Too Many Connections Error: Why It Happens and How to Fix It
Fix MySQL Too many connections by tightening idle timeouts and pooling or closing app connections first, then safely raising max_connections only if the server has RAM space.
iptables vs nftables Performance Comparison for High-Traffic Servers
Choose nftables over iptables for modern Linux firewalls when you need better scalability, cleaner rule management, and more efficient handling of large rule sets and high-traffic workloads.
Fix IRQ Imbalance Latency on Linux: IRQ Affinity and NIC Tuning
Fix random Linux latency spikes by detecting IRQ imbalance and pinning NIC interrupts to specific CPU cores with proper IRQ affinity tuning.
Vertical Scaling Fails in Production
Vertical scaling eventually fails in production because you hit hardware limits, centralize risk on a single server, and often pay more for less resilience than a horizontally scaled architecture.
Nginx vs Apache Performance for High Traffic Servers
Use Nginx for high-concurrency, static-heavy workloads and Apache for flexible, module-rich dynamic sites, then benchmark both on your stack to pick the fastest option.
PHP-FPM Max Children: Production Sizing Formula for High Traffic
Prevent PHP timeouts and out-of-memory crashes by calculating pm.max_children based on available RAM and average child process size, then tuning it to match your real traffic.
Nginx Slow Requests: Why CPU Looks Fine but Requests Are Slow
Diagnose and fix slow Nginx requests by enabling detailed logging, checking upstream response times, and tuning timeouts, buffers, and keepalive settings.