Stored __________ can drastically increase the size of your database. Limit the number of revisions WordPress keeps if you’re concerned about storage space. code example

Example: wp revisions config

// on wp-config.php -->
define( 'WP_POST_REVISIONS', 5 ); // Save max 5 revisions
define('AUTOSAVE_INTERVAL', 120 ); // Save revision automatically after 2 minutes (default 60 sec.)