I think it’s no secret by now from the obserevations ive done on the 10 sims of babbage and the two sims that make up the Dr Who Experience that Linden Labs are now starting to put more than 4 sims per core.
The way it works is this….
The new servers they have are either dual or quad core with the majority of them nowquad core servers. These servers have 4 processors but the processors all share the same memory and internal north and southbridge bandwidth cause they are on the same motherboard and internal connection to the LAN and then into the internet itself, and thats the problem that Babbage and some other sims are now starting to face.
It used to be the case that on these dual and quad core machines its was sually only 2 or 4 sims that ran off a single core. So you had a dual core fully occupied with 4 sims on a single core, thats 8 sims on the entire machine.
As I said…thats USED to be the case.
I first started noticing it happen on the Dr Who sim and put it down to just the lag the staff was causing with their scripted HUDS and toys, the dr who sim is always busy most days. Then i noticed something strange, especially with the Academy of Industry sim.
Academy right now is one of the most quietest in terms of total scripts on the landed parts of the city. Theres less than 3000 scripts running on the entire sim….but in the Spare Time catagory there was nothing, and the statistics bar was constantly pegged at 21ms script time.
Any sim which is using 21ms script time to itself within the actual sim would rubber band and lag to the end of time, but Academy wasnt showing any signs of it. The only signs it was showing was slow teleporting and a tendancy to ghost avatars on log in, log out or teleport. Thats when i checked how many sims Academy was sharing on the CPU….
…it was EIGHT…not 4…EIGHT sims on a single CPU. Two of those sim’s was a club, one of those sims was hosting a massive 40+ avatar event which was sucking up all available timing on the CPU away from the other regions it was hosting on.
It’s now become apparent after restarting Pallisade, Port Babbage, Clockhaven, Academy and Square that the “lag” that some folks complain about in the city…is not the citys fault most of the time, its because some of the city is on an 8sim CPU and is being strangled.
As such, im going to be checking spare timing on the city every few days. Normally when a sim has a double restart (one restart followed immediatley with another when the sim comes up) it forces the region to ‘jump’ to another server. So far this trick has worked, but ive been notcing as days go on that it’s becoming much more harder to land on a 4 sim CPU…now its usually 5 or 6 sims per CPU which is the norm.
These restarts will hapen at stupid o’clock in the morning, usually 1am SLT when the city is quiet and theres not a lot of people about.