Recount MySQL databases capacity

Hello
I noticed that at the user level every time you click on the word "management of MySQL" is converted capacity of these databases. In this similarly small database does not have much of a problem, but when databases are plentiful and large sizes - it takes a very long time and burden the system.

Is there any parameter or change the settings in order to recount the capacity of the database was updated once a day (as dataskq) instead of the respective conversion capacity?

See http://www.directadmin.com/features.php?id=664 it may not be exactly what you want but it's probably close enough.

I saw this solution. That's not good for me - not recalculate the capacity of large databases.
I just want to be counted capacity of all databases, but not every time, just for example, 1 time a day.