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Re: innodb_stats_on_metadata, how does it affects query optimizer?
Posted by: Rick James
Date: March 13, 2009 08:00PM

Grrr... That sounds like an ill-thought-out variable.
http://bugs.mysql.com/bug.php?id=38189

ANALYZE TABLE might still do the stats gathering. But it suffers the same problem that exists when opening a table -- it does 10 random probes, which sometimes leads to wrong stats for query optimization.

I guess you could always do USE INDEX() or FORCE INDEX(), but that seems silly.

I would rather take my chances without the variable.

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innodb_stats_on_metadata, how does it affects query optimizer?
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Marek Wierzba
March 13, 2009 08:21AM
Re: innodb_stats_on_metadata, how does it affects query optimizer?
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Rick James
March 13, 2009 08:00PM


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