I would ask for much more info, for example, what table they are in and if you can decipher what added them…and still strongly caution such db edits…btw, why do you ask? Perceived site performance, note from host?
post meta, comment meta, all the meta tables
DB is getting large, and I just have a plain old blog with pics in a gallery. Seems a lot of that crap is from multiple imports well due to many WP.com incidents I had with data issues, and yes I also wonder if host performance is affected.
This plan blog with posts/pics has used 100% of my shared CPU several times already, and it’s unbelievable to me how this could happen, so any small help is wanted.
From _postmeta
_wp_old_slug
_original_parent_id
_original_import_url
original_post_id
_original_import_author
From _commentmeta
jabber_published
These take up a lot of space from what I gather.