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MyISAM key buffer cache emptying
Posted by: Sebastien Cantos
Date: July 24, 2014 02:21AM

Hi,

I've noticed that a MyISAM MySQL instance is emptying nearly all its key buffer cache during some periods of the night. The MySQL daemon is not restarted.
Here's some graph showing this: imgur . com / ecDMlJ9

Any idea on what could cause this and how to avoid it ? I fear that this creates performances issues during the time the cache needs to be filed again.

Any help is much apreciated. Thank you in advance.

Regards,

Sebastien

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