Please join Percona’s Principal Support
Engineer Sveta Smirnova as she presents Billion Goods in Few Categories: How
Histograms Save a Life?
We store data with the intention to use it: search, retrieve, group, sort, etc. To perform these actions effectively, MySQL storage engines index data and communicate statistics with the Optimizer when it compiles a query execution plan. This approach works perfectly well unless your data distribution is uneven.
Last year I worked on several tickets where data followed …
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