Tutorials
In-depth technical tutorials, guides, and infrastructure best practices.
How to Design Production Logging Without Destroying Performance
Design a production-ready logging strategy that structures, centralizes, and tunes logs so you can debug production issues fast without drowning in noise.
Troubleshooting NUMA Latency on Multi-Socket Servers
Master NUMA bottlenecks on modern multi-socket Linux servers. This guide shows you how to detect locality issues, tune memory and CPU placement, and reclaim lost performance.
Why Your Firewall is Killing Your Network Speed And How to Fix It
Fix firewall throughput drops by watching CPU and interface errors, simplifying and reordering heavy rules, and scaling hardware or offloading filtering instead of pushing one overloaded firewall to its limits.
Resolving High-Traffic NAT Latency and Packet Loss
Fix NAT performance bottlenecks by watching CPU and conntrack load, increasing NAT table size and timeouts as needed, and scaling out with multiple NAT gateways instead of one overloaded box.
How to Fix OpenSearch Flood Stage and Disk Watermark Errors
Fix OpenSearch disk watermark errors by freeing disk on the fullest nodes, clearing the read‑only block on affected indexes, and tuning watermark thresholds so you don’t hit flood stage again.
How to Fix Container CPU Throttling and Latency in Docker and Kubernetes
Fix container CPU throttling by monitoring cgroup throttling metrics, then raising or removing strict CPU limits or using CPU pinning so your app can actually use the idle CPU on the node.
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.