I’m planning on installing memcache and APC on my server and was wondering what benefits (or conflicts) would vbo cause while running the aforementioned software?
I know this is an old topic but I did this in reverse and just switched it around. The loads seem a little lower, surprisingly! Although xcache now required a lot of additional resources.
Not sure what bug you're trying to chase, but from personal experience with xCache I recommend you do NOT enable "xcache.admin.enable.auth" if you don't absolutely need it.
It seems to cause issues with both vBulletin caching and some mods that utilize caching.