[Opensim-users] Theoretical limit on maximum number of NPCs on a region

[dz]

> From: Dr Ramesh Ramloll <r.ramloll at gmail.com>
> ...
> I was wondering how much more NPCs can be created in one region, I did not
> experience any slow down whatsoever. Or may be the question is not relevant
> because it just depends on the CPU resources and memory available. In any
> case, let me know.
> Ramesh
>
>
I have been doing NPC development and testing on the MOSES grid for almost
a year now.
My NPCs are 1/2 scale rigged mesh with prim and mesh objects attached to
them.  They are also all equipped with an AO attached as a HUD object.  I
cannot say that I am aware of any theoretical limit on the number that can
be placed in a region, but there are practical limits when you start
generating large numbers.

One of the load tests I designed used 24 synchronized NPC generators to put
2800 NPC avatars into a "regular" 0.7.6 OpenSim region.  Each of the
avatars was seated on a scripted bench, which cycled through a series of
animations.  Subsets (40-200) of the NPCs were directed to walk/run/fly
between predetermined destinations and then return to their benches.  All
2800 of the NPC's were then logged out.   The load test was considered
successful only if all portions of the test were completed without crashing
the server.   As a practical matter, it took almost an hour to log all of
the NPCs in.  Once all the NPCs were in world, groups of 20 were
"activated" to move around the sim for approximately 45 minutes. As many as
300 NPCs were "mobile" at any single time. It then took more than an hour
to log them all back out.  Sim performance was dependent on a number of
factors, and was seemed most affected by generating the NPCs,  using
in-world scripted objects  to communicate the destinations they were to
move to, and then the process of logging them out.  If I eliminate the
"walking around" aspect of the tests, I have had as many as 3400 NPCs in a
region at one time.

Doug Osborn
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