I have a blog with ~15k posts, and a DB size of 14.4M.
The website works blazingly fast from the front end, but post-edit and post-listing screens hang - either loading partially or not at all.
Even worse, the entire server gets bogged down after trying...
Examining the process manager showed that /public_html/wp-admin/edit.php or /public_html/wp-admin/post.php (post-listing and post-edit, respectively - yeah I know they seem backwards) was eating 99% CPU.
I experienced this problem on a 3rd tier Bluehost VPS, so I upgraded to a Heart Internet Hybrid 250 (12core, 28gb ram) to try and mitigate the problem - no dice :/
This is a fresh install with no plugins using Twenty Twelve
Any help getting this resolved is greatly appreciated!!
edit: This might be pertinent: When on the add-new or post-edit pages the title loads and is editable, but the content editor loads halfway. Additionally, the text appears but is white and only visible when highlighted...