1) start import of data.sql into a dummy db when both instances are running
2) pt-stalk –collect –collect-oprofile –no-stalk for the duration of the import
- oprofile will show where MySQL spends most of its time during the import
3) run pt-diskstats -g all –devices-regex sdb1 for the duration of the import
4) run poor-man-profiler for the duration of the import