The new server is now in place, which adds around 80% to the load capacity that was available last Monday when the Reading/Leeds tickets went on sale.
Had this new server been in place on Monday, then I believe that no issues would have been experienced by people using the site at that time. And as there were around 50% more users online simultaneously on Monday across the whole website than this website has experienced previously and things mostly ran OK, I think that's a pretty good indication that website capacity is now (with this new server in place) well over twice what it was last year on Glastonbury T-day.
And realistically, I'm expecting website traffic for this T-Day to be lower than the traffic was on Monday for the Reading/Leeds announcement & ticket sales - there's fewer people buy tickets for Glastonbury than do for (jointly) Reading & Leeds, plus there'll be less people around in general at 9am on a Sunday morning.
I'm very hopeful that the whole website including the forums will stay usable on Sunday, with the worst scenario hopefully being that the forums will be a little slower than normal. But of course all this is dependent on the numbers which hit this website, which can't be known until it happens.
To help keep the load down further a few temporary tweaks will also be made - mostly to do with the website chatrooms, because chatrooms can put a heavy load on servers; a number of chatrooms will be available hosted on a number of different servers, but they won't be fully integrated into the forums as they normally are.