Hetzner VPS Performance Optimization Guide
Optimize your Hetzner VPS with proven Linux tweaks, network tuning, and resource management tips for faster, more reliable performance.
When you rent a cheap VPS from Hetzner, you’re getting solid hardware for the price. But out of the box, the default configuration is often bloated and not tuned for your specific workload. Whether you run a WordPress site, a VPN, or a small application server, a few practical tweaks can cut memory usage in half and improve latency.
Disable Unused Services and Kernel Modules
Hetzner’s default images (especially Ubuntu and Debian) enable many services you do not need. The first thing I do is audit what is running.
systemctl list-units --type=service --state=running
Common candidates for disabling on a minimal VPS: unattended-upgrades, cron, rsyslog, and postfix (if you don’t need mail). For example:
sudo systemctl disable --now postfix
Also, remove unnecessary kernel modules. Create a blacklist file for modules like bluetooth, pcspkr, or firewire:
echo "blacklist pcspkr" | sudo tee /etc/modprobe.d/blacklist-extra.conf
This alone can free 100–200 MB of RAM on a 2 GB VPS.
Tune the Linux Kernel for Low Latency
Hetzner uses standard kernels. For a web server or database, you want to reduce swappiness and tweak the VM subsystem.
Edit /etc/sysctl.conf and add:
vm.swappiness=10
vm.vfs_cache_pressure=50
net.core.somaxconn=1024
Apply with sudo sysctl -p. The swappiness=10 tells the kernel to avoid swapping unless absolutely necessary. vfs_cache_pressure=50 keeps directory and inode caches longer, which helps repeated access patterns.
For network-heavy workloads (like streaming or API servers), also add:
net.ipv4.tcp_fastopen=3
net.ipv4.tcp_slow_start_after_idle=0
These reduce connection setup latency and keep TCP congestion windows open.
Optimize I/O with Noop or None Scheduler
Hetzner VPS instances use virtualized storage (SSD-based). The default I/O scheduler is often kyber or mq-deadline, but for a VPS, the none (or noop) scheduler performs best because the hypervisor handles ordering.
Check your current scheduler:
cat /sys/block/sda/queue/scheduler
To set none permanently, create a udev rule:
echo 'ACTION=="add|change", KERNEL=="sd*", ATTR{queue/scheduler}="none"' | sudo tee /etc/udev/rules.d/60-iosched.rules
Reboot or run sudo udevadm trigger to apply immediately. You should see lower I/O wait and more predictable disk performance.
Use Lightweight Web Server and PHP Configuration
If you run a web stack, ditch Apache for Nginx or Caddy. On Hetzner’s smallest VPS (2 vCPU, 2 GB RAM), Nginx with PHP-FPM uses half the memory of Apache.
For PHP-FPM, adjust pm.max_children based on your RAM. A safe formula: (Total RAM - 512 MB) / 50 MB. For 2 GB:
pm.max_children = 30
pm.start_servers = 4
pm.min_spare_servers = 2
pm.max_spare_servers = 8
Also enable OpCache:
opcache.enable=1
opcache.memory_consumption=64
opcache.max_accelerated_files=4000
This reduces PHP execution time by up to 70% for repeated requests.
Conclusion
Optimizing a Hetzner VPS is not about overclocking—it’s about removing bloat and aligning the system with your actual workload. Disable what you don’t use, tune the kernel for your memory and network profile, and choose lightweight services. These changes cost nothing but deliver a noticeably faster, more responsive server.