I started getting unresponsive script errors from while trying to edit posts. After some research many people suggested checking the postmeta table for entries attached to post_id 0.
I didn't have any entries for post_id 0 but I do have nearly 50,000 postmeta entries on a site with less than 50 posts (including pages, and custom post types). Many of the entries are numeric values attached to numeric meta keys.
Is this normal and could it be related to my unresponsive script problem?