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Data length for INNODB tables
Posted by: priya ram
Date: February 14, 2018 01:05AM

I need to calculate total space,used space and free space for a table. For this I have used "Data_length","Data_free" columns of information_schema.tables.

As per Mysql documemtation data_length column gives the clustered index length in pages.

But I have not created index on that table.Soon after creating the table the data_length column shows 16384 bytes.

Also after deleting more rows from the table "data_free" column gives value zero.

The storage engine for the table is INNODB.

How to calculate exact total space,used space and free space for a table ?

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