I’m have a similar problem. I have 4k pages and 100 Posts. When the pages accumulate to more than 3k pages, loading of admin page starts to go slow (approximately 30-45 seconds per page load). I’m using VPS and my front end page load is 3-5 second.
I do not see this slow effect problem when opening Post, Comment, Media or others.
I’m not able find a solution to this problem. I believe this is wordpress limitation? Can anyone clarify?
