Disable WordPress Post Revisions

Several versions back, WordPress came up with a great new feature most of us don’t need: Post Revisions. Post Revisions saves a copy of the post every time you update the post. Unfortunately, there is no setting in WordPress to turn off this feature and it can lead to a very bloated database. Luckily, if you don’t mind editing your wp-config.php file, you can easily turn this feature off or limit the number of revisions WordPress saves.

1. Using a text or html editor, open your wp-config.php file located in the folder containing your WordPress installation.IMPORTANT: Make a backup copy of the wp-config.php file before you start; that way, you can restore the original file if your edit causes a problem.You can also use your cPanel File Manager to edit the wp-config.php file.
2. Just before the line /* That’s all, stop editing! Happy blogging. */, paste the following code:

   define( 'WP_POST_REVISIONS', false);

3. If you want to keep x number of revisions, use the following code where 3 is the number of revisions you want to keep:

   define('WP_POST_REVISIONS', 3);

4. Save wp-config.php and wordpress will use your revision modification.
5. If you’d like to delete all of the old revisions in the database and turn off revisions, you can install the WordPress Revision Control plugin instead of editing the wp-config.php file.

• Also see How to Add a Responsive Menu to WordPress Twenty Twelve Template