WordPress saves every draft edit as revision. Posts with 100+ revisions bloat your database.
Limit Revisions in wp-config.php:
// Keep only last 3 revisions
define('WP_POST_REVISIONS', 3);
// Or disable completely
define('WP_POST_REVISIONS', false);
Add above /* That's all, stop editing! */ line.
Clean Existing Revisions:
Install “WP-Optimize” plugin → Database tab → Remove all post revisions
Result: Database 30-50% smaller, backups faster, site performs better.