If you go look at the main tags page right now, the count for the "new" sql-server tag is off by over 6000! Tags aren't normalized, and this one is still out of date after a major re-tag. It's the tenth-most used tag on Stack Overflow, and at the moment, it's not even shown on the first page.
closed as too localized by Pops, jonsca, Martijn Pieters, Rory, ChrisF♦ Sep 30 '12 at 20:47
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There's a timing issue with the queries. Because tags are full text, the global replace happens so fast that a query to "count" the instances, counts none -- as they were all just replaced milliseconds ago by the previous query.
The daily tag normalization will pick it up.
I'm seeing this issue on SuperUser - most tags are off by a small amount but some tags (eg.
mac-osx which have been replaced by a more popular
macosx actually still show a days old number.
mac-os-x is showing as 11 instead of 0.
mac-osx is showing as 12 instead of 0.
macosx is showing as 3 instead of 28.
Is the daily tag normalization suppose to clean this up?