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Re: Inserts in MySQL 8 are slower than Inserts in MySQL 5.6
Posted by: Peter Brawley
Date: February 06, 2020 02:28PM

What is the result of ...

select @@performance_schema;

> all inserts and updates get stuck of other tables for long time.

What does Show InnoDB Engne Status output during such a job?

What does ...

free -m

... show (a) during normal operation (b) during one of these very slow jobs you mention?

To see what replication to 5 slaves is contributing to your performance issues, pauses all the slaves (https://dev.mysql.com/doc/refman/5.7/en/replication-administration-pausing.html) long enough to repeat some of the tests.

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