mysql 5.7 has pretty good online DDL support[1] I have been using it exclusively now instead of pt-online-schema-change. [1] https://dev.mysql.com/doc/refman/

mysql 5.7 has pretty good online DDL support[1] I have been using it exclusively now instead of pt-online-schema-change. [1] https://dev.mysql.com/doc/refman/5.7/en/innodb-online-ddl.html https://dev.mysql.com/doc/refman/5.7/en/innodb-online-ddl.ht...