Pre a server move I'd like to tidy up the database and wonder if it is safe to simply EMPTY various tables via phpmyadmin such as
attachmentviews 68m records
moderatorlog 5,2m records
blog_views 1.5m records
adminlog 309k records

I have been pruning for the threads and posts for anything over 3 years which got rid of over 5m thread / posts view admincp prune