MySQL

After an update to mysql 5.7.23 I would get errors when trying to use mysqldump command.

Couldn't execute 'SHOW VARIABLES LIKE 'gtid\_mode: Native table 'performance_schema'.'session_variables' has the wrong structure (1682)

I had to run a mysql_upgrade command

mysql_upgrade -uroot -p{yourpassword} 

It takes a while if you have a lot of databases.

Restart your mysql server.

mysqldump should work again.