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COUNT() Query hitting I/O Limit and much Slower from 8.0.17 Onwards (Doc ID 2762281.1)

Last updated on NOVEMBER 06, 2023

Applies to:

MySQL Server - Version 8.0 and later
Information in this document applies to any platform.
Environment: Microsoft Windows using SSD for storage.


Upgrade from 8.0.17 to 8.0.20 was supposed to fix a known bug (Bug.30766089), but read i/o is slow even with SSD involved.
Need to get the query speed back to the original times.


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