This began with MT 3.11 and has not been fixed at all in MT 3.121. Everytime I try to do anything on my site that involves rebuilding -- posting a new entry, deleting comments -- mt just hangs.

In short, everything takes an inordinately long time to happen, and -- after several minutes -- usually returns a 500 Internal Server Error. If I want to post a new entry, I need to click on post, let it hang, then go to entries, edit the entry I just created and, if it hangs again, I have to rebuild my index pages (which also hangs...you get the picture.) Basically, we're now talking 15-20 minutes of work & waiting for any one given post.

Obviously, this is immensely frustrating. Any ideas what might be causing it?

Update: I had my server host look into it...changing to MySQL/dynamic entries made some difference.