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Today I noticed the questions that appeared in the SQL tag were already one hour old when they popped up on my screen. I looked into it a bit and it appears that if I searched for one tag, it did show the newest questions:

alt text

While if I searched for many tags, I only got hour-old questions:

alt text

Any idea why this is? Both searches have the Newest tab selected. But maybe I'm missing something equally obvious (wouldn't be the first time :))

EDIT: This is the multi-tag link: http://stackoverflow.com/questions/tagged/sql+or+sql-server+or+mysql+or+perl+or+regex+or+c

This is the single-tag link: http://stackoverflow.com/questions/tagged/sql

EDIT2: Retagged as bug hoping for some info on if this is by design or not.

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Done, off now for today! – Andomar Nov 13 '09 at 16:36
    
I assume one weird caching issue. Not reproducible for me. – Ladybug Killer Nov 14 '09 at 22:11
up vote 0 down vote accepted

The list of IDs that come back from a browse or search of any kind are typically are cached for a few minutes. That might be what you're seeing.

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Thanks for your reply. It was up to 30 minutes of "lag", but the issue disappeared about a week after I first saw it. Case closed :) – Andomar Dec 29 '09 at 16:15

I got the opposite result. Mutli tag:

alt text

Single tag:

alt text

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I wonder if single tag searches are cached, and multitag 'or' searches simply combine the caches? I don't know - this is interesting behavior at any rate. – Adam Davis Nov 13 '09 at 16:55
    
This shot looks like what I had expected. Is there something I do not get? – Ladybug Killer Nov 14 '09 at 22:09

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