How can you delete post revisions in WordPress blogs? Post revision is a cool way in which WordPress autosaves your posts while you type. This helps to recover posts should your browser crash, or internet crash, and you can always restore an older version of the post. But Post revisions tend to pile up in your database.
Most of times the number of post revisions is double the number of posts! No wonder the database file size is growing so fast. Every post we edit keeps accumulating post revisions. If there are frequently edited posts, the revision can be a large number.
Optimize Post Revisions
Of course you can stop post revisions by adding the following to wp-config.php (in root of your WordPress installation)