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Search Results for: mysql select 1 billion rows speed

Why MySQL could be slow with large tables ?

If you’ve been reading enough database related forums, mailing lists or blogs you probably heard complains about MySQL being unable to handle more than 1.000.000 (or select any other number) rows by some of the …


The Depth of a B-tree

Schlomi Noach recently wrote a useful primer on the depth of B-trees and how that plays out for point queries — in both clustered indexes, like InnoDB, and in unclustered indexes, like MyISAM. Here, I’d …


How much memory Innodb locks really take ?

After playing yesterday a bit with INSERT … SELECT I decided to check is Innodb locks are relly as efficient in terms of low resource usage as they are advertised. Lets start with a bit …