https://www.5ok.eu/categories/custom-hosting/Recent content in Custom Hosting on 5ok — sysadmin, devops, hostingHugoenWed, 20 May 2026 00:00:00 +0000https://www.5ok.eu/references/hosting-for-an-e-shop-doing-40000-orders-a-month/Wed, 20 May 2026 00:00:00 +0000https://www.5ok.eu/references/hosting-for-an-e-shop-doing-40000-orders-a-month/<h2 id="the-problem">The problem</h2> <p>An e-shop built on a custom PHP application ran on managed hosting that fell over during every campaign. Average TTFB 1.8 s, over 6 s at peak. The hosting provider&rsquo;s answer was that they were &ldquo;exceeding plan limits&rdquo;.</p> <h2 id="what-we-did">What we did</h2> <p>We built dedicated infrastructure across three machines:</p> <ul> <li><strong>App server</strong> — Nginx + PHP-FPM, pool settings tuned to the real load profile.</li> <li><strong>DB server</strong> — PostgreSQL with a replica, <code>shared_buffers</code> and <code>work_mem</code> sized to the dataset rather than left at defaults.</li> <li><strong>Cache layer</strong> — Varnish in front of the application for anonymous requests, Redis for sessions and application cache.</li> </ul> <p>The migration ran over a weekend with a 12-minute window for the DNS switch and final database sync.</p>