The choice of good InnoDB primary keys is a critical performance tuning decision. This post will guide you through the steps of choosing the best primary key depending on your workload. As a principal architect at Percona, one of my main duties is to tune customer databases. There are many aspects related to performance tuning which make the job complex and very interesting. In this post, I want to discuss one of the most important one: the choice of good InnoDB primary keys. You would be surprised how many times I had to explain the importance of primary keys and how many debates I had around the topic as often people have preconceived ideas that translate into doing things a certain way without further thinking.


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