INTERVIEW QUESTIONS ANALYTICS TOOLS AUTOINDEX DETAILS

Question: What is the impact on indexing to use wider UUID such as VARCHAR?

Answer: If you’re using UUID it is at least good to convert it in binary form and store as VARBINARY(16) for performance reasons. In any case you would likely to get table which is larger than if you would use auto increment. Having said that there are many people using UUID rather successful in applications which do not need to be optimized for peak performance or the cases when this does not become the bottleneck. Also check out my old article on the topic which goes into a lot more details .

If you’re using UUID it is at least good to convert it in binary form and store as VARBINARY(16) for performance reasons. In any case you would likely to get table which is larger than if you would use auto increment. Having said that there are many people using UUID rather successful in applications which do not need to be optimized for peak performance or the cases when this does not become the bottleneck. Also check out my old article on the topic which goes into a lot more details . Source: CoolInterview.com

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