Data corpses are created by plugin installations and uninstallation. Also through revisions of posts.
Plugin Solution: "WP Clean up"
- Revisions can be deleted
- Dashboard Transient Feed's can be ridiculed
- Optimize can be clicked
Limitation of revisions (wp-config.php)
define('WP_POST_REVISIONS',10);
Also solvable via the plugin "Revision Control"