I’m experiencing high Time to First Byte (~2.5 seconds) on product detail pages
in Magento 2.4.6, despite having Varnish 6.0 configured.
Environment:
- Magento 2.4.6-p3
- Nginx 1.24 + PHP-FPM 8.2
- Varnish 6.0 with default Magento VCL
- Redis for sessions and cache
- Dedicated server: 16GB RAM, 8 cores
What I’ve tried:
- Verified Varnish is caching (X-Magento-Cache hits)
- Checked slow query log – no queries over 1s
- Disabled all third-party modules – no change
- Enabled production mode
The issue persists only on product pages. Category pages load in 400ms.
What diagnostic steps should I take next?
