Changing online time

It comes from getParam(member_online_time).

Ive tracked down getParam from the bxdolDB class, but that references:

function getParam($sName, $bCache = true) {
return $this->oParams->get($sName, $bCache);
}

Which I can't track down.

Help!

This comes from the sys_options mysql table, it comes under name, after updating it, go into admin > settings > advanced > Save (which I assume recompiles a static file).