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I've been doing some retagging on Super User lately, and the tag page still shows the old, crusty, now-orphaned tags. Worse, these tags are still available via the tag autocompletion, reporting their pre-retagging tag counts.

I'm not expecting the retagging to immediately remove those orphans from the tag view, or update the tag counts. I know these are done in batch at some point. But the FAQ on zombie tags indicates the tags are pruned hourly, and that's not my experience.

So, in order to update the FAQ, I'd like to know:

  1. How frequently are zombie tags pruned?
  2. How frequently are tag counts recalculated?

My goal with this is to a) know how the website is supposed to function, so I can report a bug if I need to; and b) update the FAQ with current information, to help future categorizers and tag editors know when their efforts will be reflected in the tag list.

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marked as duplicate by animuson, hims056, Lucifer, Toon Krijthe, ChrisF Apr 15 '13 at 8:15

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

up vote 19 down vote accepted

The tag cleanup runs every 24 hours.

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thanks! straight from the horse', unicorn's... mouth. – quack quixote Feb 28 '10 at 6:19
Neat! I always thought the zombie tags hung around to constantly irritate us re-taggers. – Jared Harley Mar 1 '10 at 7:20

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