COUNT() Query hitting I/O Limit and much Slower from 8.0.17 Onwards
(Doc ID 2762281.1)
Last updated on MARCH 21, 2021
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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