DDoS Mitigation: Teaching Your Server to Say No Politely (Then Impolitely)
DDoS mitigation for self-hosters: Nginx rate limiting, Fail2ban, Cloudflare free tier, CrowdSec, and iptables tricks that actually work.
Tag: performance
All the articles with the tag "performance".
GNU parallel for Embarrassingly Parallel Tasks
GNU parallel runs tasks in parallel across CPU cores. It's faster than xargs and easier than writing a job queue. Here's when and how to use it.
WireGuard Is Fast, But You're Leaving Performance on the Table
WireGuard performance tuning: MTU optimization, CPU offloading, AllowedIPs routing, PersistentKeepalive tradeoffs, and iperf3 benchmarking. Squeeze every MB/s from your VPN tunnel.
Plex Optimization: Remote Access, Transcoding, and Taming the Beast
Make Plex actually fast: enable hardware transcoding, fix remote access without relay, tune Docker env vars, and decide if Jellyfin is calling your name.
Docker Resource Limits: Stop Letting Containers Eat Your RAM
Learn how to set Docker resource limits for memory, CPU, swap, and PIDs. Practical guide with real-world sizing examples, OOM killer behavior, and cgroups explained.
Diagnosing Slow Linux Boot with systemd-analyze
Use systemd-analyze to find which services are slowing down boot. Fix the bottlenecks.
SSH Multiplexing: Stop Reconnecting Every Time
Master SSH ControlMaster, ControlPath, and ControlPersist. Reuse connections for lightning-fast SSH, SCP, and rsync operations.
The Linux OOM Killer: Why It's Killing Your App
Understand the OOM killer, read dmesg logs, protect critical processes with oom_score_adj.
zram vs Swap: What's Actually Faster for Low-RAM Servers
Compare zram (compressed RAM) and traditional swap files. Learn when each works, setup, and real-world performance trade-offs for memory-constrained systems.
Why Docker Builds Are Slow: Layer Cache Explained
Layer caching is your build's BFF. Learn why copying files early kills the cache and how to fix it.
CPU and I/O Priority with nice and ionice
Manage Linux process priority with nice (CPU) and ionice (I/O). Learn priority levels, renice running processes, and avoid tanking server performance.
Linux File Descriptor Limits: When 1024 Isn't Enough
File descriptors and why that 1024 limit kills your server. How to check, raise, and debug fd exhaustion.