To disable WordPress revisions add the following lines of code to your wp-config.php file:
// Disable WordPress Revisions define( 'WP_POST_REVISIONS', false );
To limit WordPress revisions add the following lines of code to your wp-config.php file:
// Limit WordPress Post Revisions - recommended settings ( minimum: 2 | maximum: 5 ) define( 'WP_POST_REVISIONS', 3 );
Note: It is recommended to keep the settings at minimum.