ted, IFNULL(SUM(current_number_of_bytes_used) / NULLIF(SUM(current_count_used), 0), 0) AS current_avg_alloc, MAX(current_number_of_bytes_used) AS current_max_alloc, SUM(sum_number_of_bytes_alloc) AS total_allocated FROM performance_schema.memory_summary_by_user_by_event_name GROUP BY IF(user IS NULL, 'background', user) ORDER BY SUM(current_number_of_bytes_used) DESC;