11 articles were missing from my sitemap and Google never told me
One of my sites had 81 pages indexed and 53 not. I spent a day assuming the sitemap was broken.
It wasn't broken. It was incomplete — and that's a much quieter failure.
The difference matters
A broken sitemap gives you errors. An incomplete one gives you nothing: no warning, no error, just pages that quietly never get discovered. Search Console will happily show you "not indexed" without ever mentioning that you never submitted the URL.
How I found it
I did the least clever thing possible — I diffed two lists:
- Every URL Google knew about (pulled from the index report, with rows-per-page set to 500 so I actually saw all of them)
- Every URL in my sitemap
Anything in the second list but not the first is a candidate. Anything in neither is invisible.
Eleven articles were in neither. One of them was the landing page for a keyword cluster pulling 30 impressions a month — I'd spent time optimizing content for a page Google had never been told existed.
Why it happened
Those eleven were added after the last time the sitemap was regenerated. Nobody refreshed it. The sitemap wasn't wrong when it was written; it was just stale.
What I changed
Regenerating the sitemap from the actual file list, not from memory. And a check that compares sitemap contents against files on disk — because "the sitemap exists and returns 200" is not the same as "the sitemap is complete."
Both of those are true statements about a sitemap that's missing eleven pages.
Free diagnosis if you want me to look at yours: /