No, they don't really advertise a DJ timetable.
The only one i saw was a small A4 sheet stuck on the wall behind the door bitch who takes your money at the entry door. Problem is, i kept going back there to check the times, but the bouncers kept pushing me away because it's a restricted area.
The big name DJ's on the terrace kick off around 5-6pm. Inside, the big name DJ's kick off after 8pm.
Personally, i think the music inside is where it's at.........better DJ's and better tunes. If you like the more commercial stuff, then the terrace is fine.
I wouldn't bother getting there until very late in the afternoon........not much happens till late afternoon.