understand-show-slave-status-g

https://dba.stackexchange.com/questions/22623/mysql-exec-master-log-pos-value-greater-than-read-master-log-pos

https://dba.stackexchange.com/questions/18433/trying-to-understand-show-slave-status-g

https://dev.mysql.com/doc/refman/5.7/en/show-slave-status.html