Tutorials
In-depth technical tutorials, guides, and infrastructure best practices.
Detect and Fix Database Locking Issues without High CPU
Database locks can freeze your queries without spiking CPU, making them hard to spot. This guide shows you how to find locked queries fast and fix them the right way.
Stop OpenSearch Crashes: The Ultimate Heap Sizing Tutorial
Set OpenSearch heap to about half your RAM, keep -Xms and -Xmx the same, and leave the rest of memory for the OS cache so searches stay fast and stable.
Why Kubernetes Struggles on VPS: The Core Bottlenecks
Fix Kubernetes on slow VPSes by right‑sizing pod CPU/memory requests, avoiding strict CPU limits, and checking node disk, network, and DNS before blaming the cluster.
Linux Swap Usage Guide: Why It Happens and How to Optimize It
On Linux, swap is just an emergency backup for RAM. Keep a small swap size, lower swappiness, and alert when the system starts doing a lot of swap I/O.
Why Is My Linux Server Load High When CPU Usage Is Low?
Investigate high load with low CPU on Linux by checking for tasks stuck in uninterruptible I/O sleep (D state), slow disks, or kernel‑level bottlenecks that bloat load average without burning CPU.
Fixing MTU Mismatch Issues in Linux
Fix MTU mismatch issues by probing the path MTU with DF pings and tracepath, then standardizing MTU or lowering sender MTU/MSS across hosts, tunnels, containers, and switches so no hop fragments or drops packets.
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.