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define( 'WP_POST_REVISIONS', 2 ); // set false for none
define( 'AUTOSAVE_INTERVAL', 160 ); // Seconds, default 60
define( 'EMPTY_TRASH_DAYS', 5 ); // 5 days
define( 'WP_ALLOW_REPAIR', true ); // and then use http://www.yourwebsite.com/wp-admin/maint/repair.php