Well, tried a suggestion I got to take care of the sluggishness (create a “clean” WordPress installation and move all the data into the new databases). Sadly, that has merely demonstrated that the problem I’m dealing with is not with the specific databases that WordPress uses. However, a “pure” HTML page loads blindingly fast, so the problem is still with the database infrastructure — I just need to dig deeper. Unfortunately, the slow performance that you see is even worse when using the web browser to post content, making it really hard for me to stay on top of things. *Sigh* Digging through my.cnf and php.ini – what fun.