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Guides from the NOC

Written from running the hardware — what breaks, why, and the command that fixes it.

2 posts matching “bad-gateway” · Clear

All 2 Most read VPS 1 Troubleshooting 1
VPS PHP-FPM Pool Tuning: Fix pm.max_children on a VPS

Site crawling or throwing 502s under traffic? Learn how to calculate pm.max_children and pick dynamic vs ondemand vs static PHP-FPM on your VPS.

29 July 2026 · 6 min · 17 views Troubleshooting 502 Bad Gateway Error: Causes and How to Fix It

Seeing a 502 Bad Gateway error on your site? Learn what's really failing behind the scenes - PHP-FPM, LiteSpeed, Cloudflare - and fix it step by step.

16 July 2026 · 6 min · 35 views