If you need to determine how much data a MySQL database is consuming, use the information_schema database and run the following command:
...
mysql> use information_schema;
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mysql> select table_schema, sum(data_length)/1024/1024 from tables group by table_schema;
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...
+----------------------------+-----------------------------------------+
...
| table_schema | sum(data_length)/1024/1024 |
...
+----------------------------+-----------------------------------------+
...
| information_schema | 0.00000000 |
...
| mysql | 0.41797256 |
...
| uptime | 4031.60937500 |
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+----------------------------+-----------------------------------------+
...
3 rows in set (1.04 sec)
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In the example above, up.time is using ~ 4.03 GB.
...
| Info | ||
|---|---|---|
| ||
| This does not necessarily mean that the MySQL database file is 4.03 GB as it is generally much larger. |