mysql_perf_p_s_memory

performance-schema-instrument='memory%=COUNTED'

# Top 15 events currently eating ram
mysql> SELECT EVENT_NAME, CURRENT_NUMBER_OF_BYTES_USED FROM performance_schema.memory_summary_global_by_event_name ORDER BY CURRENT_NUMBER_OF_BYTES_USED DESC LIMIT 15;
 
         
# Top 15 events that allocated the most since restart 
mysql> SELECT EVENT_NAME, HIGH_NUMBER_OF_BYTES_USED FROM performance_schema.memory_summary_global_by_event_name ORDER BY HIGH_NUMBER_OF_BYTES_USED DESC LIMIT 15;