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Re: MySQL 8 - terrible performance
Posted by: Frederic Descamps
Date: February 15, 2019 03:32AM

Hi Hans,

We still have to take a look at the mysqlslap results you provided.

However, meanwhile, I'd like to share some info I received from our development team regarding initialization and mysql_upgrade process. I think you will also find them interesting.

So like I already wrote it, we have added a lot of spatial references. Many inserts are then run in a single transaction during --initialize btu mysql_upgrade is restricted to statements that can be run by the user, and those tables can only be modified by CREATE SPATIAL REFERENCE SYSTEM. And each CREATE statement is a separate transaction.

When you run mysql_upgrade --force (not required after initialize ofc), you then run all these one by one.

lefred.

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