Return of Reckoning

please can you explain me, because some ppl asking me about that, and I also don't know that, and wanna know. How it is with that laaaag, is it coming from problems with database, I mean virtual problems with code, data, programming things? or it come from poor server device, so better, bigger server device = no lag? How it is?

If I knew what the problem was I would already have fixed it.

There's a code profiler installed on the server, but apparently I can't connect to it when it's running (yay for network-related bullshit, my absolute favorite thing ever) so I've no idea what's up with it.