I really dislike those "tutorials" for troubleshooting memory usage of wordpress installation that give advice such as "upgrade php version, disable plugins, disable extensions". Like nobody in the wordpress community doesn't even know what the memory is!
System side, I know how to map process memory using pmap, but when all you get is anon heap mapping, then I'm kind of stuck there. 🙂
social.tomica.me is one server in the network