John,
So far I've not noticed much of a change in cpu use, but within my
configuration its rather difficult to judge as we currently have a mess
of scripts that it seems I'm forever having to clean up. So far it
seems that the phantom tests have made an impact on memory usage though,
as I stated in my last post the initial test using a clean reboot of the
server saw a decrease of around 220 megs of ram used. I've not had the
chance to continue any further with this as I'm currently under the wire
to wrap up my research paper (oddly enough on ethics within virtual
worlds), but so far within just general use I've noticed things seem to
run a bit smoother. As for cpu, I'd imagine with less things for the
avatar to collide with it would potentially be a bit less. I should
hopefully have some more data by the end of the week.
Thanks, :)
- John
John Hopkin wrote:
John Sheridan wrote:
Ok, I'm trying a little bit of an experiment here and I'm wondering if
anyone else has tried this and had similar results? We're running ODE
on Linux Ubuntu using a vps setup hosted on quad core Xeons.
I'm going on the concept that if an object does not need any sort of
physical interaction that if its made phantom the server will in effect
use less resources. In this case I have one server thats running six
sims with around 30,000 prims spread between them all. After going
around and setting as many objects as possible to phantom (telephone
poles, windows, tables, chairs, misc props and anything thats not needed
to keep the avatar from falling out of the buildings) it appears as
though that server's memory usage has gone down from about 70% (740
megs) down to 45% (520 megs). I would estimate that in total
approximately 15,000 to 20,000 prims were set to phantom.
Very interesting - thanks for looking into this.
It seems that in actual builds, those we see in use in SL, for
example, most prims don't need to be non-phantom but are, and it's not
surprising to find that your exercise reduces the cost. I've
sometimes wondered if there's a case for saying that new prims should
be phantom by default, though I'm not necessarily suggesting that as a
course of action for OpenSim. It certainly helps avatar movement when
a cleanup like you describe is done, especially with furniture,
poseballs etc, and it's well worth the time doing that even if only
for the sake of smooth operation.
Is there any indication of a corresponding drop in CPU usage,
especially when avatars are moving around in there?
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