Server Issues
Sorry, gang. Some doofuses are sending spam comments into my server (and a few other things, it seems) at a rate that’s too fast for Apache to keep up. As a result, Apache just seems to hang and become unresponsive.
Unable to detect when an incoming request is a valid commenter before passing the request on to WordPress’ comment processing system, leaving this unchecked takes down the whole server within a minute or two. There’s nothing to do about it but research the incoming requests and, in the meantime, disable the comment form. Rather, the thing that processes the comments for WordPress.