Determining size of a row in bytes

I have a small but essential requirement that is making me seriously consider a shift away from MySQL and I am wondering if MariaDB is a viable alternative.

I need to measure the size of a row in bytes (easily).

Specifically, a table consists of rows belonging to several users. I need to know how much disk space is consumed by each of those users.

The only solution I can find in MySQL documentation/forums are inefficient and inaccurate approximations.

Does MariaDB provide some way of doing this easily? I have to do it on multiple tables which will probably change, so I don't want to build maintenance overheads in. Also obviously I don't want too much of a performance hit.

Answer Answered by Ian Gilfillan in this comment.

MariaDB doesn't to my knowledge have any way of doing this that's not available in MySQL.


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