Revisions are a very helpful aspect of WordPress. However, over time your database can get clogged with hundreds of line items. Here’s a few handy code snippets to help manage WordPress revisions.
Add these to wp-config.php
Prevent WP from keeping revisions of your content:
Limit how many revisions WP keeps. Change the # to your preference:
MySQL query to delete all post revisions. Use with caution!
DELETE a,b,c FROM wp_posts a LEFT JOIN wp_term_relationships b ON (a.ID = b.object_id) LEFT JOIN wp_postmeta c ON (a.ID = c.post_id) WHERE a.post_type = 'revision'