# Write utilization now available in ISR Observability

DevFeed: [Write utilization now available in ISR Observability](<https://devfeed.tech/articles/write-utilization-now-available-in-isr-observability-1207.md>)

Original publisher: [Read original article](<https://vercel.com/changelog/write-utilization-now-available-in-isr-observability>)

Author: Mark Knichel

Published: 2026-07-16T00:00:00Z

Content type: release

Language: en

Sources: [Vercel News](<https://devfeed.tech/sources/vercel-news.md>)

Topics: [observability](<https://devfeed.tech/topics/observability.md>), [Vercel](<https://devfeed.tech/topics/vercel.md>), [Command-line interface](<https://devfeed.tech/topics/cli.md>), [Caching](<https://devfeed.tech/topics/caching.md>)

Tags: [caching](<https://devfeed.tech/tags/caching.md>), [cli](<https://devfeed.tech/tags/cli.md>), [guide](<https://devfeed.tech/tags/guide.md>), [how-to](<https://devfeed.tech/tags/how-to.md>), [observability](<https://devfeed.tech/tags/observability.md>), [reduce](<https://devfeed.tech/tags/reduce.md>), [vercel](<https://devfeed.tech/tags/vercel.md>)

## AI overview

Vercel has added a write utilization metric to the ISR Observability page for Observability Plus subscribers. The metric compares cached requests with ISR writes, helping identify routes that regenerate frequently despite receiving few requests.

## Source excerpt

The ISR Observability page now shows Observability Plus subscribers a write utilization metric, helping identify routes that regenerate often but receive few requests. Write utilization is the ratio of cached requests to ISR writes. For routes with low write utilization, consider increasing the revalidation interval or switching to on-demand revalidation to reduce costs. You can also compute write utilization using the Vercel CLI, or use agents with the cdn-caching skill to investigate. Learn more about Incremental Static Regeneration or follow our guide on how to reduce ISR regenerations and costs. Read more