I have a large Server, ARMA using everything it can, but both CPU and memory are under 15% utilized, so we just try to see how big of a battle we can have on it.

Everything, AI, tents, supply crates,

My server can handle 4000, but the count always goes up, 5000 you start to see lag

armaremoteadmin the metrics in there is where I am getting the numbers.

I'm at a loss to the 4500 number, ever thing in the mission doesn't come to that, it's normally the total of of AI an ever thing I have placed.

When I do get in, can hardly move, but when I make active units, all of them are active, normally I will only see the profiles that are not virtualized near me,

I have double checked all the settings, removed a few things,

Now I'm at 2500 objects, CPS is up to 20, and FPS, is still in the mid 20's

Fun side note enabling the same mission with a single HC, takes the CPS to 1, and FPS to 10, (normally run with no HC's they seem to make things worse)

it seems in 1.7.1.1807171 on my server nothing is virtualized, my CPS with this version dropped from 40 to 4, and my object count jumped from 700 to 4500, and the FPS dropped by 20 to 24

This mission before the upgrade, had CPS=35-40, FPS around 48, and only about 700 objects

Can you share the server log?

Drop me a message on here

O and for AWS, if you're looking to have the server run 24/7 7 days a week, AWS is not the most cost effective, but we use it for a training server and testing server, and only turn it on when it's needed, which gives up a nice powerful server at little cost for the few hours we use it

Dynamic Simulation, this issue only occurred if a unit or object was near the CAS's spawn.

It falls into the ARMA strange category, had no need to thoses objects to have Dynamic Simulation enabled, so it was a quick fix, but tested it on a few missions same results.

Windows 2016 server
64 bit
3 headless clients managed by alive

I tend to only work large scale :)

It also applies to objects you place on the map, I have used is I set up an elaborate base just to visualize after the squad heads out

What my unit has done in the past when using AI squads is the following:
First, we use Spyder Add-ons to recruit the full squad, id we are forced to respond, we just leave that squad the recruit a new one.
https://steamcommunity.com/sharedfiles/filedetails/?id=579263829

And we have always had the best luck with the multispawn in alive
http://alivemod.com/wiki/index.php/Multispawn

Oh, and if you're running an AI squad c2 is a must
https://steamcommunity.com/sharedfiles/filedetails/?id=491016790