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.
Tag: performance
All the articles with the tag "performance".
Diagnosing Slow Linux Boot with systemd-analyze
Your Linux box takes forever to boot? systemd-analyze shows exactly which services drag it down. Read blame, critical-chain, plot, and fix the slow ones.
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
Why Linux kills your app with no warning. Understand the OOM killer, read dmesg logs, and shield critical processes with oom_score_adj and swap.
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.
Understanding and Optimizing Docker’s daemon.json File
daemon.json controls how the Docker daemon behaves — logging drivers, storage drivers, registry mirrors, and the options worth tuning.
Understanding and Optimizing Performance in Proxmox VE
Squeeze more out of Proxmox VE — CPU pinning, memory ballooning, IO threads, virtio drivers, and storage tuning for faster VMs.