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MySQL / MariaDB: Show disk usage of tables and columns

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Thomas Eisenbarth
April 06, 2016Software engineer at makandra GmbH

You can find out about disk space usage of all tables within your database by running this:

SELECT table_name AS `Table`, round(((data_length + index_length) / 1024 / 1024), 2) `Size (MB)` FROM information_schema.TABLES WHERE table_schema = "$your_database";
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Replace $your_database here.

To find out the disk usage of a single column:

SELECT sum(char_length($your_column))/1024/1024 FROM $your_table

Result is in megabytes again.

Posted by Thomas Eisenbarth to makandra dev (2016-04-06 10:36)