This server is now running lighttpd. I’d capitalize it but its creators don’t. Most of my problems were caused by WordPress and its insistance on Apache’s .htaccess, (for fancy permalinks) as well as WP Super Cache. The workarounds that are out there ended up redirecting nonexistant things to the main page, something I found unacceptable. I don’t use the directory structure style permalinks, so I didn’t end up using any of the workarounds. WP Cache works fine, although my understanding is it loads PHP to serve cached files and thus is more intensive. WP Super Cache uses rewrites to avoid PHP and directly serve its files. It was really difficult to get this all working, but it is much more snappy. There was around 6MB free RAM on the Apache 2 machine even though it had 603 MB. The new server has 503 MB (an unfortunate thing I realized just now as I looked it up) and has 115 MB free. I hope it stays that way, and that there aren’t stability problems.