Originally published at: The difference in MySQL Database (PHP MyAdmin) Size and Local Database File Size (du) - Managing WP - All about Managing WordPress
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and unfortunately, it’s a work in progress. Articles http://woshub.com/compress-defrag-optimize-mariadb-mysql-db/https://dba.stackexchange.com/questions/11567/substantial-difference-between-database-size-under-mysql-and-actual-size-on-disk