Vercel
7/16/2026

Write utilization now available in ISR Observability
Short summary
Vercel's ISR Observability page now shows a write utilization metric for Observability Plus subscribers, defined as the ratio of cached requests to ISR writes. Low-utilization routes regenerate often but receive few requests, suggesting developers should increase revalidation intervals or switch to on-demand revalidation to cut costs. The metric is also accessible via Vercel CLI or AI agents with the cdn-caching skill.
- •Write utilization metric now available in Vercel ISR Observability for Plus subscribers
- •Low write utilization indicates routes that regenerate too frequently relative to traffic
- •Recommendation: increase revalidation interval or switch to on-demand revalidation to reduce costs
Generated with AI, which can make mistakes.
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