Dedicated server huge performance issue

[Migow]

hello when my team start a mission on "dedicated server" without 3d render with 30 player with a mission with high count of asset)

the server lag , every player and AI start teleporting stop moving sometime for 1 minute , the weapon are still sync when they shoot,flare are sync(but not the targeting )),only position is out of sync. the game become unplayable.

it is not a fps issue,or stutter etc.. on client.

the problem happen only under high load in "dedicated server" without 3d render.  especially if a lot of unit are moving or shoot

if 3d render is activated the problem does not happen with the same amount of player ,same mission.

it seems the problem got huge seems last patch 2.9.16.10523MT , the problem exist to a less extent since the "dedicated server" mode exist

 

Edited 4 hours ago by Migow

[PSYKOnz]

Im also seeing lag spikes on my dedicated server since the last patch, ive never had lag issues with this server but sicce this patch there are tones of them, its not my server, i know someone from ed is going to come on here and say its my server but i can say for sure its not, ive been running that server for 3 years now with no issues and the one i had before that also had no issues, latest patch, issues 

 

Edited May 29 by PSYKOnz

[Oberst Struppi]

@BIGNEWY

Dear ED Team!

As mentioned above from Migow. We also do have huge performance issues with our dedicated servers.
FYI, with almost 30 active pilots we´re one of the biggest squadrons in germany.

Right now we do run one of the biggest, avaible for everyone, dynamic missions for the CW Germany Map.
The map shows a dynamic training range, medic/rescue missions for helos, taskings on critical infrastructure which affects 
the opponents weaponry e.g. destroying a factory forces enemy fighters to have only fox2s and so on.
The map is built around the f4 phantom and takes place in that era of time.

Since the update .10523 we are dealing with huge problems. High CPU temperatures on the client side and bad performance on the server side.
The last update .10973 did not change anything. The high temperature problem still persists. It differs everytime you restart DCS.
CW Germany has been released with .9408 and it was running butterly smooth up to .10523

Please help us. We do not know where start here. What did you change?
The head of MOOSE is also part of our team. You are very welcome to our discord and your help is much appreciated to get things forward.  

 

Edited May 31 by Oberst Struppi

[Moezilla]

@Oberst Struppi there may be an issue with AI pathfinding on the GermanyCW map.

[Actium]

I used my server benchmark framework to compare the performance of the three most recent dedicated server releases and found no statistically significant differences on Caucasus.

Total CPU usage is also almost equal:

Benchmark-20250531-2.9.15.9599.log.gz
# STATS: {"CPU_TIME_USER":1745.796875,"CPU_TIME_SYSTEM":102.546875}
Benchmark-20250531-2.9.16.10532.log.gz
# STATS: {"CPU_TIME_USER":1772.40625,"CPU_TIME_SYSTEM":102.609375}
Benchmark-20250531-2.9.16.10973.log.gz
# STATS: {"CPU_TIME_USER":1822.828125,"CPU_TIME_SYSTEM":103.625}

Raw measurement data attached, if anyone wants to take a closer look.

Benchmark-20250531-2.9.15.9599.log.gz Benchmark-20250531-2.9.16.10532.log.gz Benchmark-20250531-2.9.16.10973.log.gz

[OmasRachE]

But it seems that its not a CW Germany exclusive Problem. Yesterday evening we had a training mission on our NTTR server. An escorted F15e Strike with a F16 SEAD flight following. I personaly exerienced some serious perfomance problems with my quest 3 from micro to macrostutters and a gamecrash at the beginning. after resetting the stutters came back but kept beeing "acceptable". After the stike itself on our egress when we spawnd some enemy aircraft everyone on the server face a macrostutter were everey 5 seconds the game paused for at least half a second. it later on normalizied so that we could end the mission. We all hat the feeling, that there was a significant rise of graphics storage used. Something is different, becouse such problems i normaly only faced when sitting in the f4e over Berlin and then even not so bad. But NTTR normally is a very handsome map. This time it felt like i ripped my 4080S out of the PC and built in my old 1080 again. I hope they fix it soon. 

Edited June 5 by OmasRachE

[Migow]

@BIGNEWY@Chizhagain the problem still plague the game , ED test a complex mission with 30-40 player  and 400 -800 unit  (moving  etc..)with a dedicated without 3d server , and test with a server with 3D renderer , the server without 3D renderer will perform very badly it doesn't scale , there is a fishy bug (and counterintuitive) 

the performance issue happen when you host without 3D renderer (unit stop being sync ,they stop moving  ,only every minute there is a sync on all client) it is like the server hang.

this problem doesn't not happen when there is 3D renderer turn on for the same mission ,and same amount of client player.

Снова эта проблема продолжает преследовать игру, @Eagle Dynamics протестируйте сложную миссию с 30-40 игроками и 400-800 юнитами (движущимися и т.д.) с выделенным сервером без 3D, и протестируйте с сервером с 3D-рендером, сервер без 3D будет работать очень плохо, он не масштабируется, там есть подозрительный баг (и противоречащий логике)

 

Вот перевод на русский:

"Проблема с производительностью возникает, когда вы хостите без 3D-рендерера (юниты перестают синхронизироваться, они перестают двигаться, синхронизация на всех клиентах происходит только раз в минуту) - это выглядит так, будто сервер зависает. Эта проблема не возникает, когда 3D-рендерер включен"

Edited 4 hours ago by Migow

[okopanja]

46 minutes ago, Migow said:

@BIGNEWY@Chizhagain the problem still plague the game , ED test a complex mission with 30-40 player  and 400 -800 unit  (moving  etc..)with a dedicated without 3d server , and test with a server with 3D renderer , the server without 3D will perform very badly it doesn't scale , there is a fishy bug (and counterintuitive) 

Sorry I got confused. What is the dedicated server with and without 3D renderer?

[Migow]

19 hours ago, okopanja said:

Sorry I got confused. What is the dedicated server with and without 3D renderer?

the performance issue happen when you host without 3D renderer  in heavy mission(a lot of unit and moving etc..) with a lot of client player connected(unit stop being sync ,they stop moving  ,only every minute there is a sync on all client) it is like the server hang.

this problem doesn't not happen when there is 3D renderer turn on

Edited 4 hours ago by Migow

[okopanja]

37 minutes ago, Migow said:

host without 3D renderer

You meant dedicated server with no GPU or client with no GPU which hosts multiplayer mission?

[Actium]

56 minutes ago, Migow said:

in heavy mission(a lot of unit and moving etc..) with a lot of client player connected(unit stop being sync ,they stop moving  ,only every minute there is a sync on all client) it is like the server hang.

That happens when the server simulation frame rate drops far below 1 FPS. Unfortunately, the DCS client does not warn about that condition. Because of that, I've written the FPSmon.lua script that warns about such situations in global chat to simplify performance debugging.

59 minutes ago, Migow said:

this problem doesn't not happen when there is 3D renderer turn on

So this happens with the dedicated server (DCS_server.exe), but not when using the regular client with GUI and 3D-renderer (DCS.exe) to host a mission?

[Migow]

2 hours ago, Actium said:

That happens when the server simulation frame rate drops far below 1 FPS. Unfortunately, the DCS client does not warn about that condition. Because of that, I've written the FPSmon.lua script that warns about such situations in global chat to simplify performance debugging.

So this happens with the dedicated server (DCS_server.exe), but not when using the regular client with GUI and 3D-renderer (DCS.exe) to host a mission?

So this happens with the dedicated server (DCS_server.exe), but not when using the regular client with GUI and 3D-renderer (DCS.exe) to host a mission? yes it is correct

thanks for the script