November 15, 2008

The query from hell, and other stories

I write about a lot of products whose core job boils down to Make queries run fast. Without exception, their vendors tout stories of remarkable performance gains over conventional/incumbent DBMS (reported improvement is usually at least 50-fold, and commonly 100-500+). They further claim at least 2-3X better performance than their close competitors. In making these claims, vendors usually stress that their results come from live customer benchmarks. In few if any of the cases, I judge, are they lying outright. So what’s going on?

Multiple things, I think.

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