Tag: performance

Linux ships with conservative kernel defaults. These sysctl settings tune your server for networking, memory, and file I/O, with explanations, not just paste-and-pray values.

A kernel upgrade halved one team's PostgreSQL throughput. The fix was kernel tuning: huge pages, THP, swappiness, I/O scheduler. Here's what matters and why.

Learn multi-stage Docker builds to slash image sizes by 90%. Practical before/after examples for Node.js, Python, and Go with real size comparisons.

Learn systemd socket activation to start services on-demand, save RAM, and cut boot time. Includes .socket unit files, real examples, and testing with systemd-socket-activate.

Your CI job waits 4 minutes for npm install every run. One caching strategy cuts it to 15 seconds. Here's how.

zstd is as fast as gzip with near-xz compression ratios. Here's why you should drop bzip2 forever and how to use zstd in 2026.

Your Linux box has hundreds of kernel knobs in /proc/sys that nobody ever touches. Most do not matter. Here are the handful that actually improve a Docker host.

Tmpfs vs ramfs on Linux: mount RAM-backed filesystems for blazing-fast temp storage. Covers fstab, Docker tmpfs mounts, CI/CD use cases, and the key differences.

Nextcloud advanced configuration: Redis caching, federation setup, automated backups, occ command deep dive, LDAP, external storage, and PHP-FPM tuning.

ulimit and cgroups v2: set per-process CPU, memory, and file limits, use systemd slice controls, and keep one runaway service from killing your server.

CUDA vs ROCm for AI on Linux: NVIDIA's easy path, AMD's emotional journey, and why CPU inference isn't dead yet. Real Docker setups included.

DDoS mitigation for self-hosters: Nginx rate limiting, Fail2ban, Cloudflare free tier, CrowdSec, and iptables tricks that actually work.