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Peter Jackman
Peter Jackman

Posted on Originally published at zian.ai

Reading AI Crawler Logs Past the Hit Count: 304s, Re-validation and What a Crawl Spike Really Means

Split the log by status code before you read the total. A crawl spike made mostly of 304 Not Modified responses is a crawler re-validating pages it already holds; a spike of 200 s on URLs it has never fetched is discovery. RFC 9110 defines the difference precisely, and it changes what you should do next: freshness and new URLs in the first case, nothing at all in the second.

What this covers

  • Quick answer
  • A hit count is two different events added together
  • What a 304 actually means
  • Status class to meaning to action
  • The same 304 means different things to different crawlers

This is a technical summary. The full guide — with the tables and worked examples — is on our site: *Reading AI Crawler Logs Past the Hit Count: 304s, Re-validation and What a Crawl Spike Really Means*.

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