SELECT engine,
SELECT engine,
count(*) TABLES,
concat(round(sum(table_rows)/1000000,2),'M') rows,
concat(round(sum(data_length)/(1024*1024),2),'M') DATA,
concat(round(sum(index_length)/(1024*1024),2),'M') idx,
concat(round(sum(data_length+index_length)/(1024*1024),2),'M') total_size,
round(sum(index_length)/sum(data_length),2) idxfrac
FROM information_schema.TABLES
GROUP BY engine
ORDER BY sum(data_length+index_length) DESC LIMIT 10;
mysql> SELECT engine,
-> count(*) TABLES,
-> concat(round(sum(table_rows)/1000000,2),'M') rows,
-> concat(round(sum(data_length)/(1024*1024),2),'M') DATA,
-> concat(round(sum(index_length)/(1024*1024),2),'M') idx,
-> concat(round(sum(data_length+index_length)/(1024*1024),2),'M') total_size,
-> round(sum(index_length)/sum(data_length),2) idxfrac
-> FROM information_schema.TABLES
-> GROUP BY engine
-> ORDER BY sum(data_length+index_length) DESC LIMIT 10;
+--------+--------+----------+------------+-----------+------------+---------+
| engine | TABLES | rows | DATA | idx | total_size | idxfrac |
+--------+--------+----------+------------+-----------+------------+---------+
| InnoDB | 514 | 2427.25M | 532911.78M | 42961.16M | 575872.94M | 0.08 |
| MyISAM | 32 | 0.65M | 6.10M | 19.69M | 25.79M | 3.23 |
| CSV | 2 | 0.00M | 0.00M | 0.00M | 0.00M | NULL |
| MEMORY | 28 | NULL | 0.00M | 0.00M | 0.00M | NULL |
+--------+--------+----------+------------+-----------+------------+---------+
4 rows in set (6 min 43.92 sec)