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All versions of MySQL (not Microsoft SQL Server). Please also add a version-specific tag like mysql-5.7 if that is relevant to the question.

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InnoDB SELECT from disk slow for large table but MyISAM is fast

I'm having problems determining why a simple MySQL select query on an indexed, fairly large InnoDB table is taking so long for the first run, reading from the HDD (3-4 seconds) However, switching the … I'm running this with mostly default MySQL settings, with the innodb_buffer_pool set to 7GB (not that it matters much in this case). The table has about 35 million rows. …
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