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Suggestion: table_cache recommendations might be off #36

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ywarnier opened this Issue Oct 10, 2013 · 1 comment

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@ywarnier

ywarnier commented Oct 10, 2013

First of all, many thanks for mysqltuner.pl. It is a great little app!

Second, I see that table_cache is almost always recommended very high in the variables to adjust (depending on my number of tables or temporary tables, of course). However, benchmarking apparently shows that it is not always good to increase it. See http://www.mysqlperformanceblog.com/2009/11/16/table_cache-negative-scalability/

I think it would be good to mention that in the General recommendations, or to do some kind of check to make sure the right value is suggested.

@major

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major commented Feb 21, 2014

You're welcome, @ywarnier. Thanks for the issue and the link. I'm working up a patch now.

@major major closed this in 18b4b8f Feb 21, 2014

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