PostgreSQL creates one OS process per connection, and each idle connection can consume 5–10 MB of RAM. On a small VPS with 2–4 GB of memory, an application that opens…
Read MorePHP OPcache and Realpath Cache Tuning: Cut WordPress CPU Usage on Your VPS
Every PHP request compiles the requested script from source unless the compiled bytecode is already cached in memory. A typical WordPress installation with a dozen plugins contains 500–1000 PHP files,…
Read Moresystemd Service Hardening on a VPS: ProtectSystem, PrivateTmp, and Dropping Capabilities
Most VPS security guides stop at SSH keys and a firewall. The service layer is where attackers actually get in once they find a vulnerable process, and systemd gives you…
Read MoreTCP BBR on a VPS: Enabling Congestion Control and Verifying It Actually Helps
If your VPS transfers large files slowly, or throughput collapses whenever the network drops a packet, the default congestion control algorithm is a likely culprit. Most distributions still ship CUBIC,…
Read Morevm.swappiness on a VPS: What the Kernel Actually Does and How to Measure It
vm.swappiness is the single kernel knob most VPS guides tell you to set to 10 and then forget. That advice is not wrong, but it is cargo-cult: it explains the…
Read MoreSSD vs NVMe Storage: Benchmarking and Tuning for VPS Workloads
Every VPS provider now advertises “SSD” or “NVMe” storage, but the real performance difference depends less on the interface standard and more on how the provider provisions, shares, and throttles…
Read MoreDisk Space Forensics on a Linux VPS: Where the Gigabytes Went
A full disk on a production instance does not announce itself politely. Services fail to write logs, the database refuses new connections with “no space left on device”, and PHP…
Read MoreHow to Grow a VPS Disk Partition and Filesystem After a Plan Upgrade
Resizing a VPS is sold as a two-click operation: pick the larger plan, reboot, and everything scales. The reboot is easy. What happens afterwards is where people get stuck, because…
Read MoreZero-Downtime Deploys on a Single VPS: Blue-Green and Canary Releases with Nginx
Deploying a new version of your application should not mean telling users “be right back”. On a single VPS you cannot spin up a second datacenter, but you can still…
Read Moreext4 vs XFS vs btrfs on a VPS: Real-World Benchmarks and Which Filesystem to Pick
Almost every VPS image ships ext4 by default, and for most workloads that is the right call. But “default” and “optimal” diverge the moment your workload has a strong profile:…
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