I have had a problem where when editing seemingly large wordpress pages I am served up a blank page instead of the editor. This seems to happen soley on large pages, but there was no common limit.

Digging abit further I managed to fix it by looking at the database that ran the wordpress install. The blog had around 300 posts, but the WP_POSTS had roughly 3000 posts in it!

What happens is while editing pages various ‘autosaves’ are created, which is great for backups and revisions. A problem arises when the pages are massive, as multiple copies are created and not always cleared. When the wordpress editor loads up, it must attempt to load all these extra versions, which combined means wordpress/server/the world craps out and stops working.

To solve this, you need to view the raw database, and take these steps, please backup your database before doing so!

• find out the post id number by hovering over the ‘edit’ link in your wordpress admin area.
• open phpmyadmin and view the WP_POSTS table
• Use the ’search’ function in phpMyAdmin to find the ‘post title’ of the entry you want (use the %%Like%% option)
• A page of results will come up
• Click ‘id’ to sort by ID
• The page will rejig, the lowest post number will probably be the ‘live’ post, you can tell by looking at the ‘post name’ field, and if it says ‘autosave’ then its one of the ones taking up room!
• I then delete all but the real post, obviously, and the latest autosave post.
• Voila, wordpress now only has the normal post and one autosave to load.
• Job done.

I hope this helps others as I can see alot of queries in google over this!