refresh function dealcok

We use the plugin in a big db (100.000<posts) and we got deadlock in the sql due to the refresh function of your plugin and particularly the query

    // Here's the optimization
                $wpdb->query("SET @row_number = 0;");
                $wpdb->query("UPDATE $wpdb->posts as pt JOIN (
                  SELECT ID, (@row_number:=@row_number + 1) AS <code>rank</code>
                  FROM $wpdb->posts
                  WHERE post_type = '$object' AND post_status IN ( 'publish', 'pending', 'draft', 'private', 'future' )
                  ORDER BY menu_order ASC
                ) as pt2
                ON pt.id = pt2.id
                SET pt.menu_order = pt2.<code>rank</code>;");

I just commented out the action refresh for the admin hook. Is that OK? It seems that the plugin still works.