Dealing with slow performance of "Resolve links" in dictionary import

Dictionary import hangs on Resolving links for a while even if file contained only several Concepts.

 Solution

Problem can be related to MySQL performance after upgrade, to resolve it you need to run optimization tasks, next is an example of mysqlcheck command which is coming with every mysql client or server:

mysqlcheck -h localhost -u admin -p --auto-repair --all-databases mysqlcheck -h localhost -u admin -p -o --all-databases

replace localchost with url of your database, admin with name of your mysql administrator user

Or you may find similar functionality in your favorite DB managing software, like DBeaver, phpmyadmin, MySQL Workbench, etc.