I used jmeter to stress test the table named test in my innodb cluster. I recorded all sql statements exceeding 1ms in the slow SQL log. I found that the time consumption of insert statements sometimes increased suddenly, but it was irregular.
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                    Please provide a sample `INSERT`, its time, and the `SHOW CREATE TABLE`. These may give us some more tips on where to look next. – Rick James Dec 07 '21 at 17:43