How to use Wp-Optimize plugin
http://wordpress.org/plugins/wp-optimize/ <br />http://wordpresswave.com/top-plugins-for-wordpress/ <br /> <br />WP-Optimize is a WordPress 3.xx database cleanup and optimization tool.It allows you to remove post revisions, comments in the spam queue, un-approved comments, items in trash within few clicks.It includes simple scheduler as well.