add to your wp-config.php file the following line:
// set max post revisions
define('WP_POST_REVISIONS', 5);
source: http://codex.wordpress.org/Editing_wp-config.php#Post_Revisions
add to your wp-config.php file the following line:
// set max post revisions
define('WP_POST_REVISIONS', 5);
source: http://codex.wordpress.org/Editing_wp-config.php#Post_Revisions