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Re: Bad order by performance (5.7.12 under Aurora)
Posted by: Nicola Farina
Date: November 27, 2019 02:03AM

I have tried an index but with the order by column only (ultima_elaborazione).
I will try adding the id.
Is the MySql optimizer cost based?
After creating the index do I need to re-gather statistics and/or flush some kind of query plan cache (like, eg, Oracle 'flush shared_pool' command) ?
thanks
Nicola

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Re: Bad order by performance (5.7.12 under Aurora)
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November 27, 2019 02:03AM


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