Qie Niangao Posted August 8, 2019 Share Posted August 8, 2019 At the Server User Group this week, the folks from the London City regions reported that their sims were running much better in the past week or so, compared to a lot of lag in the past, and wondered whether there was some change to which the improvement could be attributed. (There wasn't.) Coincidentally, my "home sim" is having a spot of the ol' script lag at the moment. It's tolerable, bouncing around 70% scripts run -- I only really notice it when changing alpha cuts on my mesh avatar -- but the region only has about 3000 scripts and low event rates, so it usually runs a solid 99-100% of scripts each frame with a few percent spare. I've seen this particular sim have this problem before and the next time it was restarted it immediately returned to the 100% level. We know the Lab is investigating issues with design of the script scheduler, but that's about general, steady-state overhead of managing lots of mostly idle scripts. I don't know of any attention on the weird fluctuations in script performance of sims from one restart to the next. I don't know how full region sims are virtualized on the servers, other than "one per core". Are they pinned to a specific core or do they just fight it out with processes of other sims sharing the same server? And how about (other) possibly shared resources -- cache, memory bus, network interface, etc. -- do we think Operations has a handle on which of these peg capacity during script lag events? is it known to developers? Is there any kind of systematic data collection and reporting we residents could do to help figure out what's going on? Historically, this sort of unexplained variability in performance has led SL users to sacrifice goats at the altar of "server class" and other superstitions that may have been amusing to Lindens, but I'm thinking they better get a handle on these capacity issues before they move much further to the cloud. It could be expensive to figure it out later. 2 Link to comment Share on other sites More sharing options...
Please take a moment to consider if this thread is worth bumping.
Please sign in to comment
You will be able to leave a comment after signing in
Sign In Now