WordPress: Disable Revision

  WordPress post revision function is ON by default, which means WordPress will create a new version every time you save a post, and there is no OFF option in management interface.(WordPress 3.0)

  It will cause redundancy after long time using, slow you website, and backup of your DB will be bigger.

The way to disable revision is:

• Edit wp-config.php
• Before  require_once(ABSPATH . ‘wp-settings.php’);
• Insert  define(‘WP_POST_REVISIONS’,false);

  You can find more details about Revision on WordPress official site Revision Management

  Of cause you can get it done by plug-in (please check compatibility with WordPress 3.0 before install)

Delete-Revision

  Delete redundant revisions in database, if you want to keep revision function but without too many records, you can use it delete revision on your need.

No Revisions

  Disable revision function, you can activate it once you installed WordPress, then no revision will be created any more. if there are revisions already, you can use Delete-Revision plug-in clear them firstly.