Here's some good articles on how to limit or even disable WordPress revisions for your posts.
Using a plugin
WordPress provides revision control on any pages or posts that you create which allow you to go back and see previous edits that you've written over in the database. While this can seem like a great thing to have, over time it can lead to a lot of unnecessary overhead in your WordPress database.The rest of the article.
Editing code on your web site is an inevitable event. If you have minor changes to make on your web site that can be done simply, you can use the code editor in the cPanel File manager to change the code. This is called "Editing on the fly", which is changing the files of the source website while its live. Let's go to cPanel File manager and see how this editor works. The rest of the article.