https://codex.wordpress.org/Revisions
Alternately, the limit can be set in wp-config.php:
	
	
	
		
or use the plugin
https://el.wordpress.org/plugins/better-delete-revision/
Delete existing revisions
similar - http://bacsoftwareconsulting.com/blog/index.php/web-programming/how-to-delete-and-limit-revisions-in-wordpress/
	
	
	
		
			
			Alternately, the limit can be set in wp-config.php:
		JavaScript:
	
	define( 'WP_POST_REVISIONS', 3 );
WP_POST_REVISIONS:
-true (default), -1: store every revision
-false, 0: do not store any revisions (except the one autosave per post)
-(int) > 0: store that many revisions (+1 autosave) per post. Old revisions are automatically deleted.
	or use the plugin
https://el.wordpress.org/plugins/better-delete-revision/
Delete existing revisions
similar - http://bacsoftwareconsulting.com/blog/index.php/web-programming/how-to-delete-and-limit-revisions-in-wordpress/
		JavaScript:
	
	DELETE FROM wp_posts WHERE post_type = 'revision';