How to remove references to performance_schema.user_variables_by_thread in mysql 5.6?
performance_schema.user_variables_by_thread is in MySQL-5.7 but not MySQL-5.6. It cannot be copied as its generated by the server to represent the internal state.
MySQL-5.6 seems to have deprecated Jira support per https://confluence.atlassian.com/adminjiraserver/supported-platforms-938846830.html
MySQL-5.7 reference on user_variables_by_thread