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Re: Analysis: INSERT ON DUPLICATE UPDATE VS UPDATE
Posted by: Peter Brawley
Date: May 24, 2021 04:13PM

With btrees at least, Insert On Duplicate Key entails more disk work

https://www.percona.com/blog/2010/07/14/why-insert-on-duplicate-key-update-may-be-slow-by-incurring-disk-seeks/

https://www.percona.com/blog/2010/06/18/disk-seeks-are-evil-so-lets-avoid-them-pt-4/

For more insight into the issue I thionk you'll need to consult the source code.

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Re: Analysis: INSERT ON DUPLICATE UPDATE VS UPDATE
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May 24, 2021 04:13PM


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